changelog

remove documentation (now in a separate project)
corrections in debug logger
2019-03-24 20:27:26 +01:00 · 2019-03-24 20:26:51 +01:00 · 2019-03-23 08:26:39 +01:00 · 2019-03-13 08:49:18 +01:00
48 changed files with 766 additions and 2977 deletions
--- a/12
+++ b/12
@ -1,13 +1,21 @@
+Sun Mar 24 20:24:34 2019
+	* version 3.0 rc3
+	* corrections in debug logger
+	* requirement can have callback
+	* version 3.0 rc2
+	* add cidr notation to domainnameoption if allow_ip is True (fixes #5)
+	* safer option.type() (ref #4)
+
 Tue Mar  5 08:22:12 2018 +0200 Emmanuel Garette <egarette@cadoles.com>
 	* version 3.0 rc2
 	* simplifying netmaskoption
 	* multiple option call (fixes #1)
 	* doesn't check follower requirement with an other follower or a leader if idx is None (fixes #3)

-Mon Feb  25 10:12:35 2018 +0200 Emmanuel Garette <egarette@cadoles.com>
+Mon Feb  25 10:12:35 2019 +0200 Emmanuel Garette <egarette@cadoles.com>
 	* version 3.0 rc1

-Sat Sep  8 22:54:12 2018 +0200 Emmanuel Garette <egarette@cadoles.com>
+Sat Sep  8 22:54:12 2019 +0200 Emmanuel Garette <egarette@cadoles.com>
 	* propose a new API to access to Tiramisu Option
 	This new API is totally incompatible with older's one

--- a/doc/Makefile
+++ b/doc/Makefile
@ -1,153 +0,0 @@
-# Makefile for Sphinx documentation
-#
-
-# You can set these variables from the command line.
-SPHINXOPTS    =
-SPHINXBUILD   = sphinx-build
-PAPER         =
-BUILDDIR      = _build
-
-# Internal variables.
-PAPEROPT_a4     = -D latex_paper_size=a4
-PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
-# the i18n builder cannot share the environment and doctrees with the others
-I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
-
-.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
-
-help:
-	@echo "Please use \`make <target>' where <target> is one of"
-	@echo "  html       to make standalone HTML files"
-	@echo "  dirhtml    to make HTML files named index.html in directories"
-	@echo "  singlehtml to make a single large HTML file"
-	@echo "  pickle     to make pickle files"
-	@echo "  json       to make JSON files"
-	@echo "  htmlhelp   to make HTML files and a HTML help project"
-	@echo "  qthelp     to make HTML files and a qthelp project"
-	@echo "  devhelp    to make HTML files and a Devhelp project"
-	@echo "  epub       to make an epub"
-	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
-	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
-	@echo "  text       to make text files"
-	@echo "  man        to make manual pages"
-	@echo "  texinfo    to make Texinfo files"
-	@echo "  info       to make Texinfo files and run them through makeinfo"
-	@echo "  gettext    to make PO message catalogs"
-	@echo "  changes    to make an overview of all changed/added/deprecated items"
-	@echo "  linkcheck  to check all external links for integrity"
-	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
-
-clean:
-	-rm -rf $(BUILDDIR)/*
-
-html:
-	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
-	@echo
-	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
-
-dirhtml:
-	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
-	@echo
-	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
-
-singlehtml:
-	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
-	@echo
-	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
-
-pickle:
-	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
-	@echo
-	@echo "Build finished; now you can process the pickle files."
-
-json:
-	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
-	@echo
-	@echo "Build finished; now you can process the JSON files."
-
-htmlhelp:
-	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
-	@echo
-	@echo "Build finished; now you can run HTML Help Workshop with the" \
-	      ".hhp project file in $(BUILDDIR)/htmlhelp."
-
-qthelp:
-	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
-	@echo
-	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
-	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
-	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/tiramisu.qhcp"
-	@echo "To view the help file:"
-	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/tiramisu.qhc"
-
-devhelp:
-	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
-	@echo
-	@echo "Build finished."
-	@echo "To view the help file:"
-	@echo "# mkdir -p $$HOME/.local/share/devhelp/tiramisu"
-	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/tiramisu"
-	@echo "# devhelp"
-
-epub:
-	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
-	@echo
-	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
-
-latex:
-	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
-	@echo
-	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
-	@echo "Run \`make' in that directory to run these through (pdf)latex" \
-	      "(use \`make latexpdf' here to do that automatically)."
-
-latexpdf:
-	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
-	@echo "Running LaTeX files through pdflatex..."
-	$(MAKE) -C $(BUILDDIR)/latex all-pdf
-	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
-
-text:
-	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
-	@echo
-	@echo "Build finished. The text files are in $(BUILDDIR)/text."
-
-man:
-	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
-	@echo
-	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
-
-texinfo:
-	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
-	@echo
-	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
-	@echo "Run \`make' in that directory to run these through makeinfo" \
-	      "(use \`make info' here to do that automatically)."
-
-info:
-	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
-	@echo "Running Texinfo files through makeinfo..."
-	make -C $(BUILDDIR)/texinfo info
-	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
-
-gettext:
-	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
-	@echo
-	@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
-
-changes:
-	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
-	@echo
-	@echo "The overview file is in $(BUILDDIR)/changes."
-
-linkcheck:
-	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
-	@echo
-	@echo "Link check complete; look for any errors in the above output " \
-	      "or in $(BUILDDIR)/linkcheck/output.txt."
-
-doctest:
-	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
-	@echo "Testing of doctests in the sources finished, look at the " \
-	      "results in $(BUILDDIR)/doctest/output.txt."
--- a/doc/_templates/module.rst
+++ b/doc/_templates/module.rst
@ -1,6 +0,0 @@
-{{ fullname }}
-{{ underline }}
-
-.. automodule:: {{ fullname }}
-   :members:
-   :noindex:   
--- a/doc/api.txt
+++ b/doc/api.txt
@ -1,15 +0,0 @@
-Auto generated library's API
-================================
-
-.. autosummary::
-    :toctree: api
-    :template: module.rst
-
-    tiramisu.option
-    tiramisu.setting
-    tiramisu.config
-    tiramisu.value
-    tiramisu.autolib
-    tiramisu.error
-    tiramisu.storage
-
--- a/doc/api/tiramisu.autolib.txt
+++ b/doc/api/tiramisu.autolib.txt
@ -1,6 +0,0 @@
-tiramisu.autolib
-================
-
-.. automodule:: tiramisu.autolib
-   :members:
-   :noindex:   
--- a/doc/api/tiramisu.config.txt
+++ b/doc/api/tiramisu.config.txt
@ -1,6 +0,0 @@
-tiramisu.config
-===============
-
-.. automodule:: tiramisu.config
-   :members:
-   :noindex:   
--- a/doc/api/tiramisu.error.txt
+++ b/doc/api/tiramisu.error.txt
@ -1,6 +0,0 @@
-tiramisu.error
-==============
-
-.. automodule:: tiramisu.error
-   :members:
-   :noindex:   
--- a/doc/api/tiramisu.option.txt
+++ b/doc/api/tiramisu.option.txt
@ -1,6 +0,0 @@
-tiramisu.option
-===============
-
-.. automodule:: tiramisu.option
-   :members:
-   :noindex:   
--- a/doc/api/tiramisu.setting.txt
+++ b/doc/api/tiramisu.setting.txt
@ -1,5 +0,0 @@
-tiramisu.setting
-================
-
-.. automodule:: tiramisu.setting
-   :members:
--- a/doc/api/tiramisu.storage.txt
+++ b/doc/api/tiramisu.storage.txt
@ -1,6 +0,0 @@
-tiramisu.storage
-================
-
-.. automodule:: tiramisu.storage
-   :members:
-   :noindex:   
--- a/doc/api/tiramisu.value.txt
+++ b/doc/api/tiramisu.value.txt
@ -1,5 +0,0 @@
-tiramisu.value
-==============
-
-.. automodule:: tiramisu.value
-   :members:
--- a/doc/conf.py
+++ b/doc/conf.py
@ -1,295 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# tiramisu documentation build configuration file, created by
-# sphinx-quickstart on Tue Nov 20 14:29:31 2012.
-#
-# This file is execfile()d with the current directory set to its containing dir.
-#
-# Note that not all possible configuration values are present in this
-# autogenerated file.
-#
-# All configuration values have a default; values that are commented out
-# serve to show the default.
-
-import sys, os
-
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-#sys.path.insert(0, os.path.abspath('.'))
-
-# -- General configuration -----------------------------------------------------
-
-# If your documentation needs a minimal Sphinx version, state it here.
-#needs_sphinx = '1.0'
-
-# Add any Sphinx extension module names here, as strings. They can be extensions
-# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.todo', 'sphinx.ext.coverage', 'sphinx.ext.viewcode', 'sphinx.ext.autosummary', 'sphinx.ext.extlinks']
-
-# Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
-
-# The suffix of source filenames.
-source_suffix = '.txt'
-
-# The encoding of source files.
-#source_encoding = 'utf-8-sig'
-
-# The master toctree document.
-master_doc = 'index'
-
-# General information about the project.
-project = u'tiramisu'
-copyright = u'2013, tiramisu team'
-
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-# The short X.Y version.
-version = '1'
-# The full version, including alpha/beta/rc tags.
-release = '1.0'
-
-# The language for content autogenerated by Sphinx. Refer to documentation
-# for a list of supported languages.
-#language = None
-
-# There are two options for replacing |today|: either, you set today to some
-# non-false value, then it is used:
-#today = ''
-# Else, today_fmt is used as the format for a strftime call.
-#today_fmt = '%B %d, %Y'
-
-# List of patterns, relative to source directory, that match files and
-# directories to ignore when looking for source files.
-exclude_patterns = ['_build']
-
-# The reST default role (used for this markup: `text`) to use for all documents.
-#default_role = None
-
-# If true, '()' will be appended to :func: etc. cross-reference text.
-#add_function_parentheses = True
-
-# If true, the current module name will be prepended to all description
-# unit titles (such as .. function::).
-#add_module_names = True
-
-# If true, sectionauthor and moduleauthor directives will be shown in the
-# output. They are ignored by default.
-#show_authors = False
-
-# The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
-
-# A list of ignored prefixes for module index sorting.
-#modindex_common_prefix = []
-
-
-# -- Options for HTML output ---------------------------------------------------
-
-# The theme to use for HTML and HTML Help pages.  See the documentation for
-# a list of builtin themes.
-html_theme = 'traditional'
-
-# Theme options are theme-specific and customize the look and feel of a theme
-# further.  For a list of options available for each theme, see the
-# documentation.
-#html_theme_options = {}
-
-# Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = []
-
-# The name for this set of Sphinx documents.  If None, it defaults to
-# "<project> v<release> documentation".
-#html_title = None
-
-# A shorter title for the navigation bar.  Default is the same as html_title.
-#html_short_title = None
-
-# The name of an image file (relative to this directory) to place at the top
-# of the sidebar.
-#html_logo = None
-
-# The name of an image file (within the static path) to use as favicon of the
-# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
-# pixels large.
-#html_favicon = None
-
-# Add any paths that contain custom static files (such as style sheets) here,
-# relative to this directory. They are copied after the builtin static files,
-# so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
-
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
-
-# If true, SmartyPants will be used to convert quotes and dashes to
-# typographically correct entities.
-#html_use_smartypants = True
-
-# Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
-
-# Additional templates that should be rendered to pages, maps page names to
-# template names.
-#html_additional_pages = {}
-
-# If false, no module index is generated.
-#html_domain_indices = True
-
-# If false, no index is generated.
-#html_use_index = True
-
-# If true, the index is split into individual pages for each letter.
-#html_split_index = False
-
-# If true, links to the reST sources are added to the pages.
-#html_show_sourcelink = True
-
-# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
-#html_show_sphinx = True
-
-# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
-#html_show_copyright = True
-
-# If true, an OpenSearch description file will be output, and all pages will
-# contain a <link> tag referring to it.  The value of this option must be the
-# base URL from which the finished HTML is served.
-#html_use_opensearch = ''
-
-# This is the file name suffix for HTML files (e.g. ".xhtml").
-#html_file_suffix = None
-
-# Output file base name for HTML help builder.
-htmlhelp_basename = 'tiramisudoc'
-
-
-# -- Options for LaTeX output --------------------------------------------------
-
-latex_elements = {
-# The paper size ('letterpaper' or 'a4paper').
-#'papersize': 'letterpaper',
-
-# The font size ('10pt', '11pt' or '12pt').
-#'pointsize': '10pt',
-
-# Additional stuff for the LaTeX preamble.
-#'preamble': '',
-}
-
-# Grouping the document tree into LaTeX files. List of tuples
-# (source start file, target name, title, author, documentclass [howto/manual]).
-latex_documents = [
-  ('index', 'tiramisu.tex', u'tiramisu Documentation',
-   u'gwen', 'manual'),
-]
-
-# The name of an image file (relative to this directory) to place at the top of
-# the title page.
-#latex_logo = None
-
-# For "manual" documents, if this is true, then toplevel headings are parts,
-# not chapters.
-#latex_use_parts = False
-
-# If true, show page references after internal links.
-#latex_show_pagerefs = False
-
-# If true, show URL addresses after external links.
-#latex_show_urls = False
-
-# Documents to append as an appendix to all manuals.
-#latex_appendices = []
-
-# If false, no module index is generated.
-#latex_domain_indices = True
-
-
-# -- Options for manual page output --------------------------------------------
-
-# One entry per manual page. List of tuples
-# (source start file, name, description, authors, manual section).
-man_pages = [
-    ('index', 'tiramisu', u'tiramisu Documentation',
-     [u'gwen'], 1)
-]
-
-# If true, show URL addresses after external links.
-#man_show_urls = False
-
-
-# -- Options for Texinfo output ------------------------------------------------
-
-# Grouping the document tree into Texinfo files. List of tuples
-# (source start file, target name, title, author,
-#  dir menu entry, description, category)
-texinfo_documents = [
-  ('index', 'tiramisu', u'tiramisu Documentation',
-   u'gwen', 'tiramisu', 'One line description of project.',
-   'Miscellaneous'),
-]
-
-# Documents to append as an appendix to all manuals.
-#texinfo_appendices = []
-
-# If false, no module index is generated.
-#texinfo_domain_indices = True
-
-# How to display URL addresses: 'footnote', 'no', or 'inline'.
-#texinfo_show_urls = 'footnote'
-
-
-# -- Options for Epub output ---------------------------------------------------
-
-# Bibliographic Dublin Core info.
-epub_title = u'tiramisu'
-epub_author = u'gwen'
-epub_publisher = u'gwen'
-epub_copyright = u'2012, gwen'
-
-# The language of the text. It defaults to the language option
-# or en if the language is not set.
-#epub_language = ''
-
-# The scheme of the identifier. Typical schemes are ISBN or URL.
-#epub_scheme = ''
-
-# The unique identifier of the text. This can be a ISBN number
-# or the project homepage.
-#epub_identifier = ''
-
-# A unique identification for the text.
-#epub_uid = ''
-
-# A tuple containing the cover image and cover page html template filenames.
-#epub_cover = ()
-
-# HTML files that should be inserted before the pages created by sphinx.
-# The format is a list of tuples containing the path and title.
-#epub_pre_files = []
-
-# HTML files shat should be inserted after the pages created by sphinx.
-# The format is a list of tuples containing the path and title.
-#epub_post_files = []
-
-# A list of files that should not be packed into the epub file.
-#epub_exclude_files = []
-
-# The depth of the table of contents in toc.ncx.
-#epub_tocdepth = 3
-
-# Allow duplicate toc entries.
-#epub_tocdup = True
-
-todo_include_todos = True
-
-extlinks = {'api': ('./api/tiramisu.%s', ""),
-                'test': ('./api/test.%s', "")}
-
-
-autosummary_generate = True
-
-
--- a/doc/config.png
+++ b/doc/config.png
--- a/doc/config.svg
+++ b/doc/config.svg
@ -1,257 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
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-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
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-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="400"
-   height="200"
-   id="svg2"
-   version="1.1"
-   inkscape:version="0.48.4 r9939"
-   sodipodi:docname="test.svg"
-   inkscape:export-filename="/home/gnunux/git/tiramisu/doc/storage.png"
-   inkscape:export-xdpi="135"
-   inkscape:export-ydpi="135">
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--- a/doc/config.txt
+++ b/doc/config.txt
@ -1,570 +0,0 @@
-.. default-role:: literal
-
-===============================
-Options handling basics
-===============================
-
-Tiramisu is made of almost three main objects :
-
- :class:`tiramisu.option.Option` stands for the option types
- :class:`tiramisu.option.OptionDescription` is the shema, the option's structure
- :class:`tiramisu.config.Config` which is the whole configuration entry point
-
-Accessing the `Option`'s
-------------------------
-
-The :class:`~tiramisu.config.Config` object attribute access notation stands for 
-the value of the configuration's :class:`~tiramisu.option.Option`.
-:class:`~tiramisu.config.Config`'s object attribute is the name of the option, 
-and the value is the value accessed by the `__getattr__` attribute access 
-mechanism.
-
-If the attribute of the `Config` called by `__getattr__` has not been set before
-(by the classic `__setattr__` mechanism), the default value of the `Option`
-object is returned, and if no `Option` has been declared in the
-`OptionDescription` (that is the schema of the configuration), an
-`AttributeError` is raised.
-
-::
-
-    >>> from tiramisu.config import Config 
-    >>> from tiramisu.option import BoolOption, OptionDescription
-    >>> 
-    >>> gcdummy = BoolOption('dummy', 'dummy', default=False)
-    >>> gcdummy.impl_getdefault()
-    False
-    >>> cfg.dummy
-    False
-    >>> descr = OptionDescription('tiramisu', '', [gcdummy])
-    >>> cfg = Config(descr)
-    >>> cfg.dummy = True
-    >>> cfg.dummy
-    True
-    >>> cfg.idontexist
-    AttributeError: 'OptionDescription' object has no attribute 'idontexist'
-
-The `Option` objects (in this case the :class:`~tiramisu.option.BoolOption`), 
-are organized into a tree into nested 
-:class:`~tiramisu.option.OptionDescription` objects. 
-
-.. image:: config.png
-
-Every option has a name, as does every option group. The parts 
-of the full name of the option are separated by dots: e.g. 
-``cfg.optgroup.optname``.
-
-Let's make the protocol of accessing a `Config`'s attribute explicit
-(because explicit is better than implicit):
-
-1. If the option has not been declared, an `AttributeError` is raised,
-
-2. If an option is declared, but neither a value nor a default value has
-   been set, the returned value is `None`,
-
-3. If an option is declared and a default value has been set, but no value
-   has been set, the returned value is the default value of the option,
-
-4. If an option is declared, and a value has been set, the returned value is
-   the value of the option.
-
-But there are special exceptions. We will see later on that an option can be a
-:term:`mandatory option`. A mandatory option is an option that must have a value 
-defined.
-
-Setting the value of an option
------------------------------
-
-An important part of the setting's configuration consists of setting the
-value's option. There are different ways of setting values,
-the first one is of course the `__setattr__` method
-
-::
-
-    cfg.name = value
-
-And if you wanna come back to a default value, use the builtin `del()` function::
-
-    del(cfg.name)
-
-.. module:: tiramisu.config
-
-.. _`tree`:
-
-The handling of options
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-The handling of options is split into two parts: the description of
-which options are available, what their possible values and defaults are
-and how they are organized into a tree. A specific choice of options is
-bundled into a configuration object which has a reference to its option
-description (and therefore makes sure that the configuration values
-adhere to the option description).
-
-Common manipulations
------------------------
-
-Let's perform some common manipulation on some options
-
->>> from tiramisu.config import Config
->>> from tiramisu.option import UnicodeOption, OptionDescription
->>> #
->>> var1 = UnicodeOption('var1', 'first variable')
->>> var2 = UnicodeOption('var2', '', u'value')
->>> #
->>> od1 = OptionDescription('od1', 'first OD', [var1, var2])
->>> rootod = OptionDescription('rootod', '', [od1])
-
-let's set somme access rules on the main namespace
-
->>> c = Config(rootod)
->>> c.read_write()
-
-let's travel the namespaces
-
->>> print c
-[od1]
->>> print c.od1
-var1 = None
-var2 = value
->>> print c.od1.var1
-None
->>> print c.od1.var2
-value
-
-let's modify a value (be careful to the value's type...)
-
->>> c.od1.var1 = 'value'
-Traceback (most recent call last):
-ValueError: invalid value value for option var1
->>> c.od1.var1 = u'value'
->>> print c.od1.var1
-value
->>> c.od1.var2 = u'value2'
->>> print c.od1.var2
-value2
-
-let's come back to the default value
-
->>> del(c.od1.var2)
->>> print c.od1.var2
-value
-
-The value is saved in a :class:`~tiramisu.value.Value` object. It is on this 
-object that we have to trigger the `reset`, which take the option itself 
-(`var2`) as a parameter.
-
-On the other side, in the `read_only` mode, it is not possible to modify the value
-
->>> c.read_only()
->>> c.od1.var2 = u'value2'
-Traceback (most recent call last):
-tiramisu.error.PropertiesOptionError: cannot change the value for option var2 this option is frozen
-
-
-let's retrieve the option `var1` description
-
->>> var1.impl_get_information('doc')
-'first variable'
-
-And if the option has been lost, it is possible to retrieve it again:
-
->>> c.unwrap_from_path('od1.var1').impl_get_information('doc')
-'first variable'
-
-Searching for an option
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-In an application, knowing the path of an option is not always feasible. 
-That's why a tree of options can easily be searched. First, let's build such a tree::
-
->>> var1 = UnicodeOption('var1', '')
->>> var2 = UnicodeOption('var2', '')
->>> var3 = UnicodeOption('var3', '')
->>> od1 = OptionDescription('od1', '', [var1, var2, var3])
->>> var4 = UnicodeOption('var4', '')
->>> var5 = UnicodeOption('var5', '')
->>> var6 = UnicodeOption('var6', '')
->>> var7 = UnicodeOption('var1', '', u'value')
->>> od2 = OptionDescription('od2', '', [var4, var5, var6, var7])
->>> rootod = OptionDescription('rootod', '', [od1, od2])
->>> c = Config(rootod)
->>> c.read_write()
-
-Second, let's find an option by it's name::
-
-    >>> print c.find(byname='var1')
-    [<tiramisu.option.UnicodeOption object at 0x7ff1bf7d6ef0>, 
-    <tiramisu.option.UnicodeOption object at 0x7ff1b90c7290>] 
-    
-If the option name is unique, the search can be stopped once one matched option 
-has been found:
-
-    >>> print c.find_first(byname='var1')
-    <tiramisu.option.UnicodeOption object at 0x7ff1bf7d6ef0>
-
-Instead of the option's object, the value or path can be retrieved:
-
-    >>> print c.find(byname='var1', type_='value')
-    [None, u'value']
-    >>> print c.find(byname='var1', type_='path')
-    ['od1.var1', 'od2.var1']
-    
-Finaly, a search can be performed on the values, the type or even a combination 
-of all these criteria:
-
-
-    >>> print c.find(byvalue=u'value', type_='path')
-    ['od2.var1']
-    >>> print c.find(bytype=UnicodeOption, type_='path')
-    ['od1.var1', 'od1.var2', 'od1.var3', 'od2.var4', 'od2.var5', 'od2.var6', 'od2.var1']
-    >>> print c.find(byvalue=u'value', byname='var1', bytype=UnicodeOption, type_='path')
-    ['od2.var1']
-    
-The search can be performed in a subtree:
-
->>> print c.od1.find(byname='var1', type_='path')
-['od1.var1']
-
-In a root tree or in a subtree, all option can be retrieved in a dict container:
-
-    >>> print c.make_dict()
-    {'od2.var4': None, 'od2.var5': None, 'od2.var6': None, 'od2.var1': u'value', 
-    'od1.var1': None, 'od1.var3': None, 'od1.var2': None}
-    
-If the organisation in a tree is not important, 
-:meth:`~config.SubConfig.make_dict()` results can be flattened
-
->>> print c.make_dict(flatten=True)
-{'var5': None, 'var4': None, 'var6': None, 'var1': u'value', 'var3': None, 
-'var2': None}
-
-.. note:: be carefull with this `flatten` parameter, here we have just lost 
-               two options named `var1`
-
-One can export only interesting parts of a tree of options into a dict, for 
-example the options that are in the same group that a given `var1` option::
-
-    >>> print c.make_dict(withoption='var1')
-    {'od2.var4': None, 'od2.var5': None, 'od2.var6': None, 'od2.var1': u'value', 
-    'od1.var1': None, 'od1.var3': None, 'od1.var2': None}
-    >>> print c.make_dict(withoption='var1', withvalue=u'value')
-    {'od2.var4': None, 'od2.var5': None, 'od2.var6': None, 'od2.var1': u'value'}
-    
-and of course, :meth:`~config.SubConfig.make_dict()` can be called in a subtree:
-
->>> print c.od1.make_dict(withoption='var1')
-{'var1': None, 'var3': None, 'var2': None}
-
-The owners
-~~~~~~~~~~~
-
-.. glossary::
-
-    owner
-
-        When a value is set on an option, an owner is set too, that's why one can know 
-        at any time if a value is a default value or not. Let's create a tree::
-
-            >>> var1 = UnicodeOption('var1', '', u'oui')
-            >>> od1 = OptionDescription('od1', '', [var1])
-            >>> rootod = OptionDescription('rootod', '', [od1])
-            >>> c = Config(rootod)
-            >>> c.read_write()
-            
-Then let's retrieve the owner associated to an option::
-
-   >>> print c.getowner(var1)
-   default
-   >>> c.od1.var1 = u'no'
-   >>> print c.getowner(var1)
-   user
-   >>> del(c.var1)
-   >>> print c.getowner(var1)
-   default
-
-You can create your own owner, for example to distinguish modification made by
-one user to an other one's.
-
-   >>> from tiramisu.setting import owners
-   >>> owners.addowner('toto')
-   >>> c.cfgimpl_get_settings().setowner(owners.toto)
-   >>> print c.getowner(var1)
-   default
-   >>> c.od1.var1 = u'no'
-   >>> print c.getowner(var1)
-   toto
- 
-The properties
-~~~~~~~~~~~~~~
-
-A property is an information on an option's state. 
-Let's create options with properties::
-
-    >>> var1 = UnicodeOption('var1', '', u'value', properties=('hidden',))
-    >>> var2 = UnicodeOption('var2', '', properties=('mandatory',))
-    >>> var3 = UnicodeOption('var3', '', u'value', properties=('frozen', 'unknown'))
-    >>> var4 = UnicodeOption('var4', '', u'value')
-    >>> od1 = OptionDescription('od1', '', [var1, var2, var3])
-    >>> od2 = OptionDescription('od2', '', [var4], properties=('hidden',))
-    >>> rootod = OptionDescription('rootod', '', [od1, od2])
-    >>> c = Config(rootod)
-    >>> c.read_write()
-    
-A hidden value is a value that cannot be accessed in read/write mode. This 
-option cannot be modified any more. Let's try to access to an option's value 
-with a hidden option::
-
-    >>> print c.od1.var1
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: var1 
-    with properties ['hidden']
-    >>> c.read_only()
-    >>> print c.od1.var1
-    value
-    
-A mandatory option is an option with a value that shall not be `None`. The 
-value has to be defined. Accessing to such an option is easy in read/write 
-mode. But in read only mode, an error is raised if no value has been defined:: 
-
-    >>> c.read_write()
-    >>> print c.od1.var2
-    None
-    >>> c.read_only()
-    >>> print c.od1.var2
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: var2 
-    with properties ['mandatory']
-    >>> c.read_write()
-    >>> c.od1.var2 = u'value'
-    >>> c.read_only()
-    >>> print c.od1.var2
-    value
-    
-A frozen option, is an option that cannot be modified by a user. 
-Let's try to modify a frozen option::
-
-    >>> c.read_write()
-    >>> print c.od1.var3
-    value
-    >>> c.od1.var3 = u'value2'
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: cannot change the value for option var3 this option is frozen
-    >>> c.read_only()
-    >>> print c.od1.var3
-    value
-    
-Tiramisu allows us to use user defined properties. Let's define and use one in 
-read/write or read only mode::
-
-    >>> c.cfgimpl_get_settings().append('unknown')
-    >>> print c.od1.var3
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: 
-    var3 with properties ['unknown']
-    >>> c.cfgimpl_get_settings().remove('unknown')
-    >>> print c.od1.var3
-    value 
-
-Many properties can be defined at the same time on an option::
-
-    >>> c.cfgimpl_get_settings().extend(['unknown1', 'unknown2'])
-    
-Properties can also be defined on an option group (that is, on an 
-:term:`option description`) let's hide a group and try to access to it::
-
-    >>> c.read_write()
-    >>> print c.od2.var4
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: od2 
-    with properties ['hidden']
-    >>> c.read_only()
-    >>> print c.od2.var4
-    value
-    
-Furthermore, let's retrieve the properties, delete and add the `hidden` property::
-
-    >>> c.read_write()
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1]
-    ['hidden']
-    >>> print c.od1.var1
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: 
-    var1 with properties ['hidden']
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1].remove('hidden')
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1]
-    []
-    >>> print c.od1.var1
-    value
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1].append('hidden')
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1]
-    ['hidden']
-    >>> print c.od1.var1
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: 
-    var1 with properties ['hidden']
-
-
-.. _multi-option:
-    
-The multi-options
-~~~~~~~~~~~~~~~~~~~~~
-
-.. glossary:: 
-
-    multi-option
-
-        Multi-options are normal options that have list of values (multiple values) 
-        instead of values::
-        
-            >>> var1 = UnicodeOption('var1', '', [u'val1', u'val2'], multi=True)
-            >>> od1 = OptionDescription('od1', '', [var1])
-            >>> rootod = OptionDescription('rootod', '', [od1])
-            >>> c = Config(rootod)
-            >>> c.read_write()
-            
-A multi-option's value can be manipulated like a list::
-
-    >>> print c.od1.var1
-    [u'val1', u'val2']
-    >>> c.od1.var1 = [u'var1']
-    >>> print c.od1.var1
-    [u'var1']
-    >>> c.od1.var1.append(u'val3')
-    >>> print c.od1.var1
-    [u'var1', u'val3']
-    >>> c.od1.var1.pop(1)
-    u'val3'
-    >>> print c.od1.var1
-    [u'var1']
-
-But it is not possible to set a value to a multi-option which is not a list::    
-
-    >>> c.od1.var1 = u'error'
-    Traceback (most recent call last):
-    ValueError: invalid value error for option var1 which must be a list
-    
-
-The master/slave groups
-~~~~~~~~~~~~~~~~~~~~~~~~~
-
-
-.. glossary:: 
-
-    master/slave 
-
-        A master/slave group is an :class:`~tiramisu.option.OptionDescription` and the 
-        options that lives inside.
-        
-        Inside this group, a special option, named master option, has the same name as 
-        the group. The group (the option description) is set to type `master`. 
-        All options in a master group is a multi-option (see :ref:`multi-option`).
-        The slave options have a `default_multi` attribute set to `True`::
-        
-                >>> from tiramisu.setting import groups
-                >>> from tiramisu.config import Config
-                >>> from tiramisu.option import UnicodeOption, OptionDescription
-                >>>
-                >>> var1 = UnicodeOption('master', '', multi=True)
-                >>> var2 = UnicodeOption('slave1', '', multi=True)
-                >>> var3 = UnicodeOption('slave2', '', multi=True, default_multi=u"default")
-                >>>
-                >>> od1 = OptionDescription('master', '', [var1, var2, var3])
-                >>> od1.impl_set_group_type(groups.master)
-                >>>
-                >>> rootod = OptionDescription('rootod', '', [od1])
-                >>> c = Config(rootod)
-                >>> c.read_write()
-                
-The length of the lists can be modified::
-
-    >>> print c.master
-    master = []
-    slave1 = []
-    slave2 = []
-    >>> c.master.master.append(u'oui')
-    >>> print c.master
-    master = [u'oui']
-    slave1 = [None]
-    slave2 = [u'default']
-    >>> c.master.master = [u'non']
-    >>> print c.master
-    master = [u'non']
-    slave1 = [None]
-    slave2 = [u'default']
-    >>>
-    >>> c.master.master = [u'oui', u'non']
-    >>> print c.master
-    master = [u'oui', u'non']
-    slave1 = [None, None]
-    slave2 = [u'default', u'default']
-
-But it is forbidden to change the lenght of a slave::
-
-    >>> c.master.slave1[0] = u'super'
-    >>> print c.master
-    master = [u'oui', u'non']
-    slave1 = [u'super', None]
-    slave2 = [u'default', u'default']
-    >>> c.master.slave1 = [u'new1', u'new2']
-    >>> print c.master
-    master = [u'oui', u'non']
-    slave1 = [u'new1', u'new2']
-    slave2 = [u'default', u'default']
-    >>> c.master.slave1 = [u'new1']
-    Traceback (most recent call last):
-    tiramisu.error.SlaveError: invalid len for the slave: slave1 which has master.master as master
-    >>> c.master.slave1 = [u'new1', u'new2', u'new3']
-    tiramisu.error.SlaveError: invalid len for the slave: slave1 which has master.master as master
-    
-you have to call the `pop` function on the master::
-
-    >>> c.master.master = [u'oui']
-    Traceback (most recent call last):
-    tiramisu.error.SlaveError: invalid len for the master: master which has slave1 as slave with greater len
-    >>> c.master.master.pop(0)
-    u'oui'
-    >>> print c.master
-    master = [u'non']
-    slave1 = [u'new2']
-    slave2 = [u'default']
-             
-Configuration's interesting methods 
------------------------------------------
-
-A `Config` object is informed by an `option.OptionDescription`
-instance. The attributes of the ``Config`` objects are the names of the
-children of the ``OptionDescription``.
-
-Here are the (useful) methods on ``Config`` (or `SubConfig`).
-
-.. currentmodule:: tiramisu.config
-
-.. class:: Config
-
-.. autoclass:: SubConfig
-    :members: find, find_first, __iter__, iter_groups, iter_all, make_dict
-
-    .. automethod:: __init__
-
-    .. rubric:: Summary
-
-    .. autosummary::
-
-       find
-       find_first
-
-       __iter__
-       iter_groups
-       iter_all
-
-       make_dict
-
-    .. rubric:: Methods
-
-
-A :class:`~config.CommonConfig` is a abstract base class. A
-:class:`~config.SubConfig` is an just in time created objects that wraps an
-::class:`~option.OptionDescription`. A SubConfig differs from a Config in the
-fact that a config is a root object and has an environnement, a context which
-defines the different properties, access rules, vs... There is generally only
-one Config, and many SubConfigs.
--- a/doc/consistency.txt
+++ b/doc/consistency.txt
@ -1,306 +0,0 @@
-.. default-role:: literal
-
-.. currentmodule:: tiramisu
-
-The global consistency
-===========================
-
-Identical option names
----------------------
-
-If an :class:`~option.Option()` happens to be defined twice in the
-:term:`schema` (e.g. the :class:`~option.OptionDescription()`),
-that is the two options actually have the same name, an exception is raised.
-
-The calculation is currently carried out in the samespace, for example
-if `config.gc.name` is defined, another option in `gc` with the name
-`name` is **not** allowed, whereas `config.whateverelse.name` is still
-allowed.
-
-Option's values type validation
--------------------------------
-
-When a value is set to the option, the value is validated by the
-option's :class:`option.Option()` validator's type.
-
-Notice that if the option is `multi`, that is the `multi` attribute is set to
-`True`, then the validation of the option value accepts a list of values
-of the same type.
-
-For example, an :class:`option.IntOption` validator waits for an `int` object of 
-course, an :class:`option.StrOption` validator waits for an `str`, vs...
-
-Where are located the values
-------------------------------
-
-The entry point of the acces to the values is the :class:`setting.Setting()` of 
-the root configuration object, but the values are actually located in the 
-:class:`value.Values()` object, in order to be delegated in some kind of a 
-`tiramisu.storage`, which can be a in-memory storage, or a persistent (for the 
-time being, a sqlite3) storage.
-
-:class:`value.Values()` is also responsible of the owners and the calculation 
-of the options that have callbacks.
-
-Requirements
------------
-
-Configuration options can specify requirements as parameters at the init
-time, the specification of some links between options or groups allows
-to carry out a dependencies calculation. For example, an option can ben
-hidden if another option has been set with some expected value. This is
-just an example, the possibilities are hudge.
-
-A requirement is a list of dictionaries that have fairly this form::
-
-    [{'option': a, 'expected': False, 'action': 'disabled', 'inverse': True,
-    'transitive':True, 'same_action': True}]
-
-Actually a transformation is made to this dictionary during the validation of 
-this requires at the :class:`~option.Option()`'s init. The dictionary becomes 
-a tuple, wich is passed to the :meth:`~setting.Settings.apply_requires()` 
-method. Take a look at the code to fully understand the exact meaning of the 
-requirements:
-
-.. automethod:: tiramisu.setting.Settings.apply_requires
-
-
-The path of the option is required, the second element is the value wich is 
-expected to trigger the callback, it is required too, and the third one is the 
-callback's action name (`hide`, `show`...), wich is a 
-:class:`~setting.Property()`. Requirements are validated in 
-:class:`setting.Setting`.
-
-
-Let's create an option wich has requirements::
-
-    >>> from tiramisu.option import *
-    >>> from tiramisu.config import *
-    >>> var2 = UnicodeOption('var2', '', u'oui')
-    >>> var1 = UnicodeOption('var1', '', u'value', requires=[{'option':var2, 'expected':u'non', 'action':'hidden'}])
-    >>> var3 = UnicodeOption('var3', '', u'value', requires=[{'option':var2, 'expected':u'non', 'action':'hidden'}, {'option':var2, 'expected':u'non', 'action':'disabled'}])
-    >>> var4 = UnicodeOption('var4', '', u'oui')
-    >>> od1 = OptionDescription('od1', '', [var1, var2, var3])
-    >>> od2 = OptionDescription('od2', '', [var4], requires=[{'option':od1.var2, 'expected':u'oui', 'action':'hidden', 'inverse':True}])
-    >>> rootod = OptionDescription('rootod', '', [od1, od2])
-    >>> c = Config(rootod)
-    >>> c.read_write()
-
-The requirement here is the dict `{'option':var2, 'expected':u'non', 
-'action':'hidden'}` wich means that is the option `'od1.var2'` is set to 
-`'non'`, the option `'od1.var1'` is gonna be hidden. On the other hand, if the 
-option `'od1.var2'` is different from `'non'`, the option `'od1.var1'` is not 
-hidden any more::
-
-    >>> print c.cfgimpl_get_settings()[rootod.od1.var1]
-    []
-    >>> print c.od1.var1
-    value
-    >>> print c.od1.var2
-    oui
-    >>> c.od1.var2 = u'non'
-    >>> print c.cfgimpl_get_settings()[rootod.od1.var1]
-    ['hidden']
-    >>> print c.od1.var1
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: 
-    var1 with properties ['hidden']
-    >>> c.od1.var2 = u'oui'
-    >>> print c.cfgimpl_get_settings()[rootod.od1.var1]
-    []
-    >>> print c.od1.var1
-    value
-    
-The requirement on `od2` is `{'option':od1.var2, 'expected':u'oui', 
-'action':'hidden', 'inverse':True}`, which means that if the option `od1.var2` 
-is set to `oui`, the option is not hidden (because of the `True` at the end of 
-the tuple wich means 'inverted', take a look at the :doc:`consistency` 
-document.)::
-
-    >>> print c.od2.var4
-    oui
-    >>> c.od1.var2 = u'non'
-    >>> print c.od2.var4
-    Traceback (most recent call last):
-    tiramisu.error.PropertiesOptionError: trying to access to an option named: od2 with properties ['hidden']
-    >>> c.od1.var2 = u'oui'
-    >>> print c.od2.var4
-    oui
-    
-Requirements can be accumulated 
-
-    >>> print c.cfgimpl_get_settings()[rootod.od1.var3]
-    []
-    >>> c.od1.var2 = u'non'
-    >>> print c.cfgimpl_get_settings()[rootod.od1.var3]
-    ['disabled', 'hidden']
-    >>> c.od1.var2 = u'oui'
-    >>> print c.cfgimpl_get_settings()[rootod.od1.var3]
-    []
-
-Requirements can be accumulated for different or identical properties (inverted 
-or not)::
-
-    >>> a = UnicodeOption('var3', '', u'value', requires=[{'option':od1.var2, 
-    ... 'expected':'non', 'action':'hidden'}, {'option':od1.var1, 'expected':'oui', 
-    ... 'action':'hidden'}])
-    >>> a = UnicodeOption('var3', '', u'value', requires=[{'option':od1.var2, 
-    ... 'expected':'non', 'action':'hidden'}, {'option':od1.var1, 'excepted':'oui', 
-    ... 'action':'disabled', 'inverse':True}])
-    
-But it is not possible to have inverted requirements on the same property. 
-Here is an impossible situation::
-
-    >>> a = UnicodeOption('var3', '', u'value', requires=[{'option':od1.var2, 
-    ... 'expected':'non', 'action':'hidden'}, {'option':od1.var1, 'expected':'oui', 
-    ... 'hidden', True}])
-    
-    Traceback (most recent call last):
-    ValueError: inconsistency in action types for option: var3 action: hidden
-            
-Validation upon a whole configuration object
----------------------------------------------
-
-An option's integrity can be validated towards a whole configuration.
-
-This type of validation is very open. Let's take a use case : an option
-has a certain value, and the value of this option can change the owner
-of another option or option group... Everything is possible.
-
-.. currentmodule:: tiramisu.option
-
-Other hooks are availables to validate upon a whole configuration at any time, 
-for example the consistency between two options (typically, an 
-:class:`IPOption` and a :class:`NetworkOption`).
-
-Let's define validator (wich is a normal python function)::
-
-    >>> def valid_a(value, letter=''):
-    ...     return value.startswith(letter)
-    
-Here is an option wich uses this validator::
-
-    >>> var1 = UnicodeOption('var1', '', u'oui', validator=valid_a, validator_args={'letter': 'o'})
-    >>> od1 = OptionDescription('od1', '', [var1])
-    >>> rootod = OptionDescription('rootod', '', [od1])
-    >>> c = Config(rootod)
-    >>> c.read_write()
-    
-The validation is applied at the modification time::
-
-    >>> c.od1.var1 = u'non'
-    Traceback (most recent call last):
-    ValueError: invalid value non for option var1
-    >>> c.od1.var1 = u'oh non'
-    
-You can disabled this validation::
-    
-    >>> c.cfgimpl_get_settings().remove('validator')
-    >>> c.od1.var1 = u'non'
-    
-
-Values that are calculated
--------------------------------
-
-An option that have a callback is considered to have a value that is to be 
-calculated. 
-
-An option's property with a `force_store_value` attribute is considered to be 
-modified at the first calculation.
-
-.. automodule:: tiramisu.autolib
-    :members:
-
-This is the typically protocol for accessing a option's for a calculated value, 
-but some twisted ways are also possible, take a look at the `force_store_value` 
-attribute.
-
-.. glossary:: 
-
-    force store value 
-
-        A calculated value (that is, an option that has a callback) with the 
-        attribute `force_store_value` enabled is considered to be modified at 
-        the first calculation
-
-Let's create four calculation functions::
-
-    def return_calc():
-        #return an unicode value
-        return u'calc'
-    
-    def return_value(value):
-       return value
-    
-    def return_value_param(param=u''):
-       return param
-    
-    def return_no_value_if_non(value):
-        #if value is not u'non' return value
-        if value == u'non':
-            return None
-        else:
-            return value
-
-Then we create four options using theses functions::
-
-    >>> var1 = UnicodeOption('var1', '', callback=return_calc)
-    >>> var2 = UnicodeOption('var2', '', callback=return_value, callback_params={'': (u'value',)})
-    >>> var3 = UnicodeOption('var3', '', callback=return_value_param, callback_params={'param': (u'value_param',)})
-    >>> var4 = UnicodeOption('var4', '', callback=return_no_value_if_non, callback_params={'': (('od1.var5', False),)})
-    >>> var5 = UnicodeOption('var5', '', u'oui')
-    >>> od1 = OptionDescription('od1', '', [var1, var2, var3, var4, var5])
-    >>> rootod = OptionDescription('rootod', '', [od1])
-    >>> c = Config(rootod)
-    >>> c.read_write()
-
-The first option `var1` returns the result of the `return_calc` function, wich 
-is `u'calc'`::
-
-    >>> print c.od1.var1
-    calc
-
-The second option `var2` returns the result of the `return_value` fucntion, 
-wich is `value`. The parameter `u'value'` is passed to this function::
-
-    >>> print c.od1.var2
-    value
-
-The third option `var3` returns the result of the function `return_value_param`
-with the named parameter `param` and the value `u'value_param'`::
-
-    >>> print c.od1.var3
-    value_param
-
-The fourth option `var4` returns the reslut of the function `return_no_value_if_non` 
-that is the value of `od1.var5` exceptif the value is  u`non`::
-
-    >>> print c.od1.var4
-    oui
-    >>> c.od1.var5 = u'new'
-    >>> print c.od1.var4
-    new
-    >>> c.od1.var5 = u'non'
-    >>> print c.od1.var4
-    None
-    
-The calculation replaces the default value. 
-If we modify the value, the calculation is not carried out any more::
-
-    >>> print c.od1.var1
-    calc
-    >>> c.od1.var1 = u'new_value'
-    >>> print c.od1.var1
-    new_value
-    
-To force the calculation to be carried out in some cases, one must add the 
-`frozen` and the `force_default_on_freeze` properties::
-
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1].append('frozen')
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1].append('force_default_on_freeze')
-    >>> print c.od1.var1
-    calc
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1].remove('frozen')
-    >>> c.cfgimpl_get_settings()[rootod.od1.var1].remove('force_default_on_freeze')
-    >>> print c.od1.var1
-    new_value
--- a/doc/doctest.txt
+++ b/doc/doctest.txt
@ -1,92 +0,0 @@
-Test framework
-==================
-
-Have a look at the :file:`test` subdirectory of the project. 
-We are using py.test_ 
-
-.. _py.test: http://pytest.org/latest/
-
-
-config APIs
-----------------
-
-.. automodule:: test.test_config
-    :members:
-
-option APIs
---------------
-
-.. automodule:: test.test_option
-    :members:
-
-
-others
----------
-
-.. automodule:: test.test_mandatory
-    :members:
-
-.. automodule:: test.test_config_big_example
-    :members:
-
-.. automodule:: test.test_option_default
-    :members:
-
-.. automodule:: test.test_option_consistency
-    :members:
-
-.. automodule:: test.test_cache
-    :members:
-
-.. automodule:: test.test_option_setting
-    :members:
-
-.. automodule:: test.test_freeze
-    :members:
-
-.. automodule:: test.test_config_ip
-    :members:
-
-.. automodule:: test.test_slots
-    :members:
-
-.. automodule:: test.test_reverse_from_path
-    :members:
-
-.. automodule:: test.test_requires
-    :members:
-
-.. automodule:: test.test_option_owner
-    :members:
-
-.. automodule:: test.test_permissive
-    :members:
-
-.. automodule:: test.test_option_type
-    :members:
-
-.. automodule:: test.test_dereference
-    :members:
-
-.. automodule:: test.test_storage
-    :members:
-
-.. automodule:: test.test_option_calculation
-    :members:
-
-.. automodule:: test.test_option_with_special_name
-    :members:
-
-.. automodule:: test.test_config_domain
-    :members:
-
-.. automodule:: test.test_symlink
-    :members:
-
-.. automodule:: test.test_metaconfig
-    :members:
-
-.. automodule:: test.test_parsing_group
-    :members:
-
-
--- a/doc/eole-report/presentation/Makefile
+++ b/doc/eole-report/presentation/Makefile
@ -1,12 +0,0 @@
-SRC=$(wildcard *.tex)
-OBJ=$(subst .tex,.pdf,$(SRC))
-
-pdf: $(OBJ)
-
-%.pdf: %.tex
-	pdflatex $< 
-
-clean:
-	rm -f $(OBJ)
-	rm -f *.aux *.log *.toc *.snm *.out *.nav
-	
--- a/doc/eole-report/presentation/definition.tex
+++ b/doc/eole-report/presentation/definition.tex
@ -1,69 +0,0 @@
-\begin{frame}
- \frametitle{Comparaison entre le noyau de Créole et Tiramisu}
- \begin{itemize}
-  \item \emph{Tiramisu} a pour objectif de 
-  \begin{itemize}
-  \item remplacer le noyau \emph{Creole} (\texttt{EoleDict}) de manière transparente ; 
-  \item résoudre les problèmes inhérents à \texttt{CreoleServ} ;
-  \end{itemize}
-  \item au niveau du code, il y a enfin une vraie séparation du c\oe ur et du fonctionnel ;
-  \item valide le type \emph{et la structure}, l'ajout de types est aisé.
-  \item \emph{Creole} : \texttt{EoleDict, EoleVars} $ \Leftrightarrow $ \texttt{Config, Option}\\
-  cf \texttt{tiramisu/doc/build/pydoc/index.html}
-  \item intégré à \texttt{gen\_config}, \texttt{cheetah}, \texttt{DTD Creole}, syntaxe \texttt{Creole} \dots
-  \item \texttt{eole-report/D02CoherenceVariables.pdf}
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{Gestionnaire de configuration existants}
- \begin{itemize}
-  \item Le gestionnaire de conf de Victor Stinner $\Rightarrow$ \emph{NuFw}; 
-  \item puppet, cfgengine... $\Rightarrow$ intéressant, de nombreux comportements peuvent être repris, mais tel quel difficilement compatible avec \emph{Creole};
-  \item \emph{Creole} $\Leftrightarrow$ \texttt{tiramisu/doc/build/glossary.html}
-\end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{Un "vrai" serveur de config}
- \begin{itemize}
-  \item un serveur de données de configuration ;
-  \item $1^{ere}$ méthode : exportation (snapshot) d'un état de la config $ \Rightarrow $ Créole ;
-  \item $2^{eme}$ méthode : JIT (just in time) calculation, une modification 
-de l'état de la configuration est possible \emph{pendant} la manipulation et l'utilisation de la conf $ \Rightarrow $ Tiramisu.
-  \item \texttt{doc/getting-started.html}
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{Qu'est-ce qu'un gestionnaire de conf moderne ?}
- \begin{itemize}
-  \item c'est une organisation arborescente des données (les données sont imbriquées) ;
-  \item c'est un accès facile aux données (typiquement une interface de type \emph{dictionnaire}) ;
-  \item clefs-valeurs, mais quelles valeurs exactement ? $ \Rightarrow $ calcul JIT (just in time) ;
-  \item \texttt{eole-report/D01AccesVariables.pdf}
-\end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{Définition d'un gestionnaire de configuration}
- \begin{itemize}
-  \item les families, groups, master \dots~ ce sont des \emph{schémas} de données (\texttt{OptionDescription}) ;
-  \item c'est la configuration (\texttt{Config}) qui est responsable de l'accès aux valeurs ;
-  \item la configuration est aisément manipulable, et a un point d'entrée unique ;
-  \item l'accès aux valeurs des \texttt{Options} de configuration ne peut se faire \emph{que} depuis la conf racine.
-  \item \texttt{eole-report/D01AccesVariables.pdf}
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{Organisation en espace de nommage}
- \begin{itemize}
-  \item dans \emph{tiramisu} l'accent est mis sur l'organisation arborescente des données ;
-  \item la validation des options de configuration se fait par l'appartenance aux groupes (families, master/slaves \dots) ;
-  \item l'organisation en groupes est unifiée par l'espace de nommage ;
-  \item \texttt{eole-report/D03ReglesEtats.pdf}
-  \item lisibilité d'une config : \texttt{tiramisu/report/build/index.html} rapport html d'une config
- \end{itemize}
-\end{frame}
-
--- a/doc/eole-report/presentation/statut.tex
+++ b/doc/eole-report/presentation/statut.tex
@ -1,61 +0,0 @@
-
-\begin{frame}
- \frametitle{Etats ("status") de la configuration}
- \begin{itemize}
-  \item système d'états de la configuration par \emph{droits d'accès} ;
-  \item \texttt{read write}, \texttt{read only} ;
-  \item correspond à \texttt{freeze}, \texttt{hidden}, \texttt{disabled} \dots ;
-  \item \texttt{doc/status.html} ;
-  \item \texttt{eole-report/D03ReglesEtats.pdf} ;
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{hidden if in, hidden if not in}
- \begin{itemize}
- \item les hidden if in, disabled if, \dots sont généralisés
- \item dans tiramisu, ce sont des pré-requis sur une (des) variables
- \item \texttt{eole-report/D03ReglesEtats.pdf}
- \item \texttt{doc/consistency.html}
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{un peu de mathématiques : prévenir les deadlocks}
- \begin{itemize}
-\item sûreté : prévention des deadlocks ; 
-\item dans tiramisu, le modèle est suffisamment abstrait pour que son exploitation mathématique soit 
-réalisable par les techniques de \emph{Model Checking} ; 
-\item soit on a besoin de ne connaître que l'ensemble des états, pas leurs liens $\Rightarrow$ espace d'états ; 
-\item soit on a besoin de connaître toutes les relations $\Rightarrow$ graphe d'accessibilité ; 
-\item la configuration est modélisable en une structure de \emph{Kripe} ;
-\item déjà le parsing de la conf est facile, la preuve : \texttt{tiramisu/report/build/index.html}
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{un peu de mathématiques (suite) CreoleLint}
- \begin{itemize}
-\item exemple : $ P = 3 \wedge Q = 1 \triangleleft \langle P = 1 \hookleftarrow Q = 0 \rangle$
-\item la propriété \og dans aucun état on a $P = 3$ et $Q = 1$  \fg~ est-elle vraie ? 
-Pour vérifier cette propriété, on a besoin de connaître l'espace d'états ;
-\item la propriété \og chaque chemin débutant dans un état accessible $P=1$ passe par un état où $Q=3$ et $P=2$ \fg~  
-est-elle vraie ? Cela demande de connaître le graphe d'accessibilité ; 
-\item les structures de \emph{Kripe} sont des machines à états étiquetées par les valuations de toutes les variables propositionnelles ;
-\item une compliation statique devient possible dans \emph{CreoleLint} \dots
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \frametitle{compatibilité Créole : ce qui reste à faire}
- \begin{itemize}
-\item les options spéciales sont implémentées (auto, fill, obligatoire, \dots) reste la librairie des fonctions pour les variables automatiques \texttt{eosfunc} ;
-\item tous les états sont implémentés (hidden, disabled, mode (normal/expert), \dots), il faut fixer les comportement \texttt{read write} ; 
-\item les "valprec" (valeur précédentes) et une mémoire de \emph{tous} les états antérieurs ; 
-\item fixer les comportement des hides (sous-groupes récursifs, \dots) ;
-\item validations master/slaves, validations globales au regard de la configuration entière puisque c'est possible maintenant.
-\end{itemize}
-
-\end{frame}
-
-
--- a/doc/eole-report/presentation/tiramisu.tex
+++ b/doc/eole-report/presentation/tiramisu.tex
@ -1,36 +0,0 @@
-%%presentation
-\documentclass{beamer}
-\usepackage{beamerthemetree}
-%%impression
-%\documentclass[a4paper,9pt]{extarticle}
-%\usepackage{beamerarticle}
-%%
-
-% class FR
-\usepackage[T1]{fontenc}
-\usepackage[utf8]{inputenc}
-\usepackage[frenchb]{babel}
-
-% image
-%% \usepackage{graphicx}
-\usepackage{alltt}
-\usecolortheme{crane}
-\beamertemplatetransparentcovered
-%\logo{\includegraphics[height=1cm]{ban.png}}
-
-\title{Tiramisu}
-\subtitle{gestionnaire de configuration}
-\author{Gwen}
-\institute{\texttt{git clone git://git.labs.libre-entreprise.org/tiramisu.git} \\ 
-\texttt{firefox tiramisu/doc/build/index.html}}
-
-\date{\today}
-
-\begin{document}
-\frame{\titlepage}
-
-\include{definition}
-\include{statut}
-
-\end{document}
-
--- a/doc/error.txt
+++ b/doc/error.txt
@ -1,19 +0,0 @@
-Errors that may be encountered
-==================================
-
-Three builtins exceptions are used : 
-----------------------------------------
-
- **ValueError** : Validation error, parameters error, a list instead 
-                   of a Multi, or if the value does not make sense
-
- **TypeError** : type error in a parameter
-
- **AttributeError** : wrong path or unknownd  option or optiondescription 
-    
-And five other exceptions :
------------------------------
-
-.. automodule:: tiramisu.error
-   :members:
-   
--- a/doc/getting-started.txt
+++ b/doc/getting-started.txt
@ -1,86 +0,0 @@
-==================================
-Getting started
-==================================
-
-What is options handling ?
-=================================
-
-Due to more and more available options required to set up an operating system,
-compiler options or whatever, it became quite annoying to hand the necessary
-options to where they are actually used and even more annoying to add new
-options. To circumvent these problems the configuration control was
-introduced...
-
-What is Tiramisu ?
-===================
-
-Tiramisu is an options handler and an options controller, which aims at
-producing flexible and fast options access. The main advantages are its access
-rules and the fact that the whole consistency is preserved at any time, see
-:doc:`consistency`. There is of course type and structure validations, but also
-validations towards the whole options. Furthermore, options can be reached and
-changed according to the access rules from nearly everywhere in your appliance.
-
-Just the facts
-==============
-
-.. _gettingtiramisu:
-
-`tiramisu`\ 's home page is here_
-
-.. _here: https://forge.cadoles.com/Cadoles/tiramisu
-
-Download
---------
-
-
-To obtain a copy of the sources, check it out from the repository using `git`.
-We suggest using `git` if one wants to access to the current developments.
-
-::
-
-    git clone https://forge.cadoles.com/Cadoles/tiramisu.git
-
-This will get you a fresh checkout of the code repository in a local directory
-named ``tiramisu``.
-
-Getting started
-------------------
-
-Option objects can be created in different ways. Let's perform very basic
-:class:`~tiramisu.option.Option` and :class:`~tiramisu.config.Config` object
-manipulations:
-
-::
-
-    >>> from tiramisu.config import Config
-    >>> from tiramisu.option import OptionDescription, BoolOption
-    >>> # let's create a group of options... with only one option inside
-    >>> descr = OptionDescription("optgroup", "", [
-    ...     BoolOption("bool", "", default=False)])
-    >>> # c is a namespace as well as a container for the options
-    >>> c = Config(descr)
-    >>> c.bool
-    False
-    >>> c.bool = True
-    >>> c.bool
-    True
-
-So by now, we have:
-
- a namespace (which is `c` here)
- the access of an option's value by the
-  attribute access way (here `bool`, which is a boolean option
-  :class:`~tiramisu.option.BoolOption()`.
-
-So, option objects are produced at the entry point `c` and then handed down to
-where they are actually used when `c.bool` is triggered. This keeps options
-local but available at any timer and consistent.
-
-Once the namespace is created, we can set a
-:meth:`~config.CommonConfig.read_write()` access to the options::
-
-    >>> c.read_write()
-
-which enables us to set a bunch of access rules that we wil explain later in
-:doc:`status`.
--- a/doc/glossary.txt
+++ b/doc/glossary.txt
@ -1,86 +0,0 @@
-.. default-role:: literal
-
-Glossary
-==========
-
-.. glossary::
-
-    configuration
-
-        Global configuration object, wich contains the whole configuration
-        options *and* their descriptions (option types and group)
-
-    schema
-    option description
-
-        see :class:`tiramisu.option.OptionDescription`
-
-        The schema of a configuration :
-
-        - the option types
-
-        - how they are organised in groups or even subgroups, that's why we
-          call them **groups** too.
-
-    configuration option
-
-        An option object wich has a name and a value and can be accessed
-        from the configuration object
-
-    access rules
-
-        Global access rules are : :meth:`~config.CommonConfig.read_write()` or
-        :meth:`~config.Config.read_only()`, see :doc:`status`
-
-    default value
-
-        Default value of a configuration option. The default value can be
-        set at instanciation time, or even at any moment. Remember that if
-        you reset the default value, the owner reset to `default`
-
-    freeze
-
-        A whole configuration can be frozen (used in read only access). See
-        :ref:`frozen` for details.
-
-        A single option can be frozen too.
-
-    value owner
-
-        When an option is modified, including at the instanciation, we
-        always know who has modified it. It's the owner of the option, see
-        :doc:`status` for more details.
-
-    option with properties
-
-        an option wich has property like 'hidden' or 'disabled' is an option
-        wich has restricted acces rules
-
-    hidden option
-
-        a hidden option has a different behaviour on regards to the access
-        of the value in the configuration, see :doc:`status` for more details.
-
-    disabled option
-
-        a disabled option has a different behaviour on regards to the access
-        of the value in the configuration, see :doc:`status` for more details.
-
-    mandatory option
-
-        A mandatory option is a configuration option wich value has to be
-        set, that is the default value cannot be `None`.
-
-    consistency
-
-        Preserving the consistency in a whole configuration is a tricky thing,
-        tiramisu takes care of it for you, see :doc:`consistency` for details.
-
-    context
-    
-        The context is a :class:`tiramisu.setting.Setting()` object in the 
-        configuration that enables us to access to the global properties
-        
-        for example the `read_write` or `read_only` :term:`access rules`
-
-        
--- a/doc/index.txt
+++ b/doc/index.txt
@ -1,62 +0,0 @@
-.. default-role:: literal
-
-.. meta::
-
-   :description: configuration management
-   :keywords: config, configuration
-
-.. title:: tiramisu
-
-The tasting of `Tiramisu`
-=========================
-
-.. image:: logo.png
-   :height: 150px
-
-`Tiramisu`
-
-    is a cool, refreshing Italian dessert,
-
-    it is also an `options controller tool`_.
-
-.. _`options controller tool`: http://en.wikipedia.org/wiki/Configuration_management#Overview
-
-
-It's a pretty small, local (that is, straight on the operating system) options
-handler and controller.
-
-controlling options explanations
--------------------------------------
-
-.. toctree::
-    :maxdepth: 1
-
-    getting-started
-    config
-    option
-    storage
-    status
-    consistency
-    error
-    glossary
-    api
-    doctest
-
-Indices and tables
-==================
-
-* :ref:`genindex`
-* :ref:`modindex`
-* :ref:`search`
-
-.. note:: The tiramisu code is licensed under the `LGPL licence`_ 
-          and this documentation is licensed under the `Creative Commons 
-          Attribution-ShareAlike 3.0 Unported License`_\ .
-          
-
-
-.. _`Creative Commons Attribution-ShareAlike 3.0 Unported License`: http://creativecommons.org/licenses/by-sa/3.0/deed.en_US
-
-.. _`LGPL licence`: http://www.gnu.org/licenses/lgpl.html
-
-.. todolist::
--- a/doc/logo.png
+++ b/doc/logo.png
--- a/doc/option.txt
+++ b/doc/option.txt
@ -1,125 +0,0 @@
-.. default-role:: literal
-
-.. module:: tiramisu.option
-
-The options types
-===================
-
-Description of Options
----------------------
-
-All the constructors take a ``name`` and a ``doc`` argument as first
-arguments to give to the option or option description a name and a description document.
-Most constructors take a ``default`` argument that specifies the default
-value of the option. If this argument is not supplied the default value
-is assumed to be ``None``.
-
-The `Option` base class
-------------------------
-
-It's the abstract base class for almost all options (except the symlink).
-
-.. _optioninit:
-
-.. autoclass:: Option
-    :special-members:
-    :members:
-
-All option types
------------------
-
-BoolOption
-~~~~~~~~~~
-
-.. autoclass:: BoolOption
-    :private-members:
-
-IntOption
-~~~~~~~~~
-
-.. autoclass:: IntOption
-    :private-members:
-
-FloatOption
-~~~~~~~~~~~
-
-.. autoclass:: FloatOption
-    :private-members:
-
-StrOption
-~~~~~~~~~
-
-.. autoclass:: StrOption
-    :private-members:
-
-UnicodeOption
-~~~~~~~~~~~~~
-
-.. autoclass:: UnicodeOption
-    :private-members:
-
-SymLinkOption
-~~~~~~~~~~~~~
-
-.. autoclass:: SymLinkOption
-    :private-members:
-
-
-``SymLinkOption`` redirects to another configuration option in the
-configuration, that is :
-
- retrieves the value of the target,
- can set the value of the target too
-
-IPOption
-~~~~~~~~
-
-.. autoclass:: IPOption
-    :private-members:
-
-PortOption
-~~~~~~~~~~
-
-.. autoclass:: PortOption
-    :private-members:
-
-NetmaskOption
-~~~~~~~~~~~~~
-
-.. autoclass:: NetmaskOption
-    :private-members:
-
-NetworkOption
-~~~~~~~~~~~~~
-
-.. autoclass:: NetworkOption
-    :private-members:
-
-DomainnameOption
-~~~~~~~~~~~~~~~~
-
-.. autoclass:: DomainnameOption
-    :private-members:
-
-ChoiceOption
-~~~~~~~~~~~~
-
-.. autoclass:: ChoiceOption
-    :private-members:
-
-
-.. _optdescr:
-
-The `OptionDescription` class
-------------------------------
-
-.. autoclass:: OptionDescription
-    :special-members:
-    :members:
-
-
-If you need to access to an option object, you can do it with the 
-OptionDescription object. Not only the value of the option by attribute access, 
-but the option object itself that lives behind the scene. It can always be 
-accessed internally. The option objects are in the `_children` 
-`OptionDescription`'s attribute.
--- a/doc/status.txt
+++ b/doc/status.txt
@ -1,155 +0,0 @@
-.. default-role:: literal
-
-Local statuses and global settings
-=====================================
-
-Available configuration statuses
----------------------------------
-
-.. currentmodule:: tiramisu
-
-The configuration's status lives in an :class:`setting.Setting()` object.
-This configuration status corresponds to specific attributes or bunch of
-attributes that can be accessed together with some `setting.Setting`
-method:
-
-**read write status**
-
-    The configuration can be accessed by `__get__` and `__set__`
-    properties, except for the `hidden` configuration options but, yes, it is
-    possible to modify a disabled option.
-
-    To enable read-write status, call 
-    :class:`~config.CommonConfig.read_write()` on the config.
-
-**read only status**
-
-    The whole configuration is `frozen`, that is modifiying a value is
-    forbidden. We can access to a configuration option only with the
-    `__getattr__` property.
-
-    The configuration has not an access to the hidden options
-    but can read the disabled options.
-
-    To enable read only status, call :class:`~config.SubConfig.read_only()` on 
-    the config.
-
-.. csv-table:: **Configuration's statuses summary**
-   :header: " ", "Hidden", "Disabled", "Mandatory"
-
-    "read only status", `False`, `True`, `True`
-    "read-write status", `True`, `False`, `False`
-
-.. _`frozen`:
-
-Freezing a configuration
---------------------------
-
-At the configuration level, :class:`~setting.Setting()` enables us to freeze the 
-whole configuration, wich means that the frozen :class:`~option.Option()`'s 
-values cannot be modified.
-
-It is possible to *freeze* a single :class:`~option.Option()` object with
-:meth:`~config.SubConfig.cfgimpl_get_settings()`. If you try to modify a frozen 
-option, it raises a `TypeError: trying to change a frozen option object`.
-
-To find out if an option `myoption` is frozen, just make an assertion on the 
-settings like that::
-    
-    'frozen' in cfg.cfgimpl_get_settings()[myoption]
-
-Moreover, frozen option can return their default values if
-:meth:`~option.Option.force_default()` is called on this option.
-
-.. glossary::
-
-    force default on freeze
-
-        A single option is frozen and we want the option to return something
-        else than his value, typically it is his default value.
-
-        In the option's values, an attribute can be set 
-        :attr:`force_default_on_freeze`, that forces this behavior.
-
-Restricted access to an `Option()`
-----------------------------------
-
-.. autoclass:: tiramisu.setting.Property
-
-The `properties` attribute is in charge of the access rules' option's value.
-
-Configuration options access statuses are defined at configuration level
-that corresponds to the `option.Option()`'s `properties` attribute,
-for example: hidden, disabled. 
-
-Use the pythonic way to know if a property is there::
-
-    'hidden' in c.cfgimpl_get_settings()
-    'frozen' in c.cfgimpl_get_settings()[opt]
-
-To access to the global settings::
-
-    cfg.cfgimpl_get_settings()
-    cfg.cfgimpl_get_settings()[option1]
-
-to add, or suppress a global property::
-
-    cfg.cfgimpl_get_settings()[option1].append('hidden')
-    cfg.cfgimpl_get_settings()[option1].remove('hidden')
-
-to activate, deactivate properties::
-
-    cfg.cfgimpl_get_settings().append('hidden')
-    cfg.cfgimpl_get_settings().remove('hidden')
-
-The global properties are living in e :class:`~setting.Setting` object. A 
-`Setting` object also takes care of the way to access option values and the 
-storage in the cache.
-
-Value owners
-------------
-
-Every configuration option has a **owner**. When the option is instanciated, 
-the owner is :obj:`setting.owners.default` because a default value has been set 
-(including `None`, wich means that no value has been set yet).
-
-.. method:: config.CommonConfig.getowner() 
-
-   This method can retrieve an Option's owner. 
-
- At the instance of the `Config` object, the value owner is 
-  :obj:`setting.owners.default` because
-  the default values are set at the instance of the configuration option 
-  object,
-
- at the modification of an option, the owner is `owners.default`, (which is 
-  :obj:`owners.user`)
-  
-Special behaviors for an option
---------------------------------
-
-**mandatory**
-
-    A mandatory option shall return a value. If a value, or a default value
-    has not been set, a error is raised.
-
-**has a callback**
-
-    This means that it is a calculated value and therefore automatically
-    protected it cannot be modified by attribute access.
-
-**force_store_value**
-
-    if the configuration option has a default value, the default is
-    returned, otherwise the value is calculated.
-
-    Its inner state is represented by `option.Option.force_default()`
-
-Configuration options have default values that are stored in the
-`Option()` object itself. Default values, the `default`, can be set in
-various ways.
-
-If a default value is modified by overriding it, not only the value of
-the option resets to the default that is proposed, but the owner is
-modified too, it is reseted to `owners.default`.
-
--- a/doc/storage.png
+++ b/doc/storage.png
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-       xml:space="preserve"
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-    <g
-       id="g4201"
-       transform="translate(-17,590)">
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-         xml:space="preserve"><tspan
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-    </g>
-    <path
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-</svg>
--- a/doc/storage.txt
+++ b/doc/storage.txt
@ -1,52 +0,0 @@
-Storage
-=======
-
-.. automodule:: tiramisu.storage
-
-.. automethod:: tiramisu.storage.set_storage
-
-.. image:: storage.png
-
-Dictionary
-~~~~~~~~~~
-
-.. automodule:: tiramisu.storage.dictionary
-
-Dictionary settings:
-
-.. automethod:: tiramisu.storage.dictionary.storage.Setting
-
-Sqlite3
-~~~~~~~
-
-.. automodule:: tiramisu.storage.sqlite3
-
-Sqlite3 settings:
-
-.. automethod:: tiramisu.storage.sqlite3.storage.Setting
-
-Example
-~~~~~~~
-
->>> from tiramisu.option import StrOption, OptionDescription
->>> from tiramisu.config import Config
->>> from tiramisu.storage import set_storage
->>> set_storage('sqlite3', dir_database='/tmp/tiramisu')
->>> s = StrOption('str', '')
->>> o = OptionDescription('od', '', [s])
->>> c1 = Config(o, persistent=True, session_id='xxxx')
->>> c1.str
->>> c1.str = 'yes'
->>> c1.str
-'yes'
->>> del(c1)
->>> c2 = Config(o, persistent=True, session_id='xxxx')
->>> c2.str
-'yes'
->>> del(c2)
->>> list_sessions()
-['xxxx']
->>> delete_session('xxxx')
->>> c3 = Config(o, persistent=True, session_id='xxxx')
->>> c3.str
-
--- a/test/test_option_callback.py
+++ b/test/test_option_callback.py
@ -1240,7 +1240,6 @@ def test_calc_value_condition():


 def test_calc_value_allow_none():
-    from tiramisu import calc_value, StrOption, OptionDescription, Config, Params, ParamOption, ParamValue
    val1 = StrOption('val1', "", 'val1')
    val2 = StrOption('val2', "")
    val3 = StrOption('val3', "", multi=True, callback=calc_value, callback_params=Params((ParamOption(val1), ParamOption(val2)), multi=ParamValue(True), allow_none=ParamValue(True)))
@ -1250,7 +1249,6 @@ def test_calc_value_allow_none():


 def test_calc_value_remove_duplicate():
-    from tiramisu import calc_value, StrOption, OptionDescription, Config, Params, ParamOption, ParamValue
    val1 = StrOption('val1', "", 'val1')
    val2 = StrOption('val2', "", 'val1')
    val3 = StrOption('val3', "", multi=True, callback=calc_value, callback_params=Params((ParamOption(val1), ParamOption(val2)), multi=ParamValue(True), remove_duplicate_value=ParamValue(True)))
@ -1260,7 +1258,6 @@ def test_calc_value_remove_duplicate():


 def test_calc_value_join():
-    from tiramisu import calc_value, StrOption, OptionDescription, Config, Params, ParamOption, ParamValue
    val1 = StrOption('val1', "", 'val1')
    val2 = StrOption('val2', "", 'val2')
    val3 = StrOption('val3', "", callback=calc_value, callback_params=Params((ParamOption(val1), ParamOption(val2)), join=ParamValue('.')))
@ -1270,7 +1267,6 @@ def test_calc_value_join():


 def test_calc_value_min():
-    from tiramisu import calc_value, StrOption, OptionDescription, Config, Params, ParamOption, ParamValue
    val1 = StrOption('val1', "", 'val1')
    val2 = StrOption('val2', "", 'val2')
    val3 = StrOption('val3', "", 'val3')
@ -1284,7 +1280,6 @@ def test_calc_value_min():


 def test_calc_value_add():
-    from tiramisu import calc_value, IntOption, OptionDescription, Config, Params, ParamOption, ParamValue
    val1 = IntOption('val1', "", 1)
    val2 = IntOption('val2', "", 2)
    val3 = IntOption('val3', "", callback=calc_value, callback_params=Params((ParamOption(val1), ParamOption(val2)), operator=ParamValue('add')))
--- a/test/test_requires.py
+++ b/test/test_requires.py
@ -8,7 +8,7 @@ from tiramisu.setting import groups
 from tiramisu import setting
 setting.expires_time = 1
 from tiramisu import IPOption, OptionDescription, BoolOption, IntOption, StrOption, \
-                     Leadership, Config
+                     Leadership, Config, calc_value, Params, ParamOption
 from tiramisu.error import PropertiesOptionError, RequirementError
 from py.test import raises
 from tiramisu.storage import list_sessions, delete_session
@ -65,6 +65,27 @@ def test_requires():
    api.option('ip_address_service').value.get()


+def test_requires_callback():
+    a = BoolOption('activate_service', '', True)
+    b = IPOption('ip_address_service', '',
+                 requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(a)), 'expected': False, 'action': 'disabled'}])
+    od = OptionDescription('service', '', [a, b])
+    api = Config(od)
+    api.property.read_write()
+    assert not api.option('activate_service').option.requires()
+    assert api.option('ip_address_service').option.requires()
+    api.option('ip_address_service').value.get()
+    api.option('activate_service').value.set(False)
+    props = []
+    try:
+        api.option('ip_address_service').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+    api.option('activate_service').value.set(True)
+    api.option('ip_address_service').value.get()
+
+
 def test_requires_inverse():
    a = BoolOption('activate_service', '', True)
    b = IPOption('ip_address_service', '',
@ -179,6 +200,44 @@ def test_requires_same_action():
    assert frozenset(props) == frozenset(['disabled'])


+def test_requires_same_action_callback():
+    activate_service = BoolOption('activate_service', '', True)
+    activate_service_web = BoolOption('activate_service_web', '', True,
+                                      requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(activate_service)), 'expected': False,
+                                                 'action': 'new'}])
+
+    ip_address_service_web = IPOption('ip_address_service_web', '',
+                                      requires=[{'option': activate_service_web, 'expected': False,
+                                                 'action': 'disabled', 'inverse': False,
+                                                 'transitive': True, 'same_action': False}])
+    od1 = OptionDescription('service', '', [activate_service, activate_service_web, ip_address_service_web])
+    api = Config(od1)
+    api.property.read_write()
+    api.property.add('new')
+    api.option('activate_service').value.get()
+    api.option('activate_service_web').value.get()
+    api.option('ip_address_service_web').value.get()
+    api.option('activate_service').value.set(False)
+    #
+    props = []
+    try:
+        api.option('activate_service_web').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['new'])
+    #
+    props = []
+    try:
+        api.option('ip_address_service_web').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+        submsg = '"disabled" (' + _('the calculated value is {0}').format('"False"') + ')'
+        assert str(err) == str(_('cannot access to {0} "{1}" because has {2} {3}').format('option', 'ip_address_service_web', 'property', submsg))
+        #access to cache
+        assert str(err) == str(_('cannot access to {0} "{1}" because has {2} {3}').format('option', 'ip_address_service_web', 'property', submsg))
+    assert frozenset(props) == frozenset(['disabled'])
+
+
 def test_multiple_requires():
    a = StrOption('activate_service', '')
    b = IPOption('ip_address_service', '',
@ -326,6 +385,36 @@ def test_requires_transitive():
    assert frozenset(props) == frozenset(['disabled'])


+def test_requires_transitive_callback():
+    a = BoolOption('activate_service', '', True)
+    b = BoolOption('activate_service_web', '', True,
+                   requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(a)), 'expected': False, 'action': 'disabled'}])
+
+    d = IPOption('ip_address_service_web', '',
+                 requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(b)), 'expected': False, 'action': 'disabled'}])
+    od = OptionDescription('service', '', [a, b, d])
+    api = Config(od)
+    api.property.read_write()
+    api.option('activate_service').value.get()
+    api.option('activate_service_web').value.get()
+    api.option('ip_address_service_web').value.get()
+    api.option('activate_service').value.set(False)
+    #
+    props = []
+    try:
+        api.option('activate_service_web').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+    #
+    props = []
+    try:
+        api.option('ip_address_service_web').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+
+
 def test_requires_transitive_unrestraint():
    a = BoolOption('activate_service', '', True)
    b = BoolOption('activate_service_web', '', True,
@ -589,6 +678,46 @@ def test_requires_multi_disabled():
    assert frozenset(props) == frozenset(['disabled'])


+def test_requires_multi_disabled_callback():
+    a = BoolOption('activate_service', '')
+    b = IntOption('num_service', '')
+    c = IPOption('ip_address_service', '',
+                 requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(a)), 'expected': True, 'action': 'disabled'},
+                           {'callback': calc_value, 'callback_params': Params(ParamOption(b)), 'expected': 1, 'action': 'disabled'}])
+    od = OptionDescription('service', '', [a, b, c])
+    api = Config(od)
+    api.property.read_write()
+
+    api.option('ip_address_service').value.get()
+
+    api.option('activate_service').value.set(True)
+    props = []
+    try:
+        api.option('ip_address_service').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+
+    api.option('activate_service').value.set(False)
+    api.option('ip_address_service').value.get()
+
+    api.option('num_service').value.set(1)
+    props = []
+    try:
+        api.option('ip_address_service').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+
+    api.option('activate_service').value.set(True)
+    props = []
+    try:
+        api.option('ip_address_service').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+
+
 def test_requires_multi_disabled_new_format():
    a = BoolOption('activate_service', '')
    b = IntOption('num_service', '')
@ -1006,6 +1135,56 @@ def test_leadership_requires():
    del ret['ip_admin_eth0.netmask_admin_eth0']


+def test_leadership_requires_callback():
+    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True)
+    netmask_admin_eth0 = StrOption('netmask_admin_eth0', "masque du sous-réseau", multi=True,
+                                   requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(ip_admin_eth0)), 'expected': '192.168.1.1', 'action': 'disabled'}])
+    interface1 = Leadership('ip_admin_eth0', '', [ip_admin_eth0, netmask_admin_eth0])
+    maconfig = OptionDescription('toto', '', [interface1])
+    api = Config(maconfig)
+    api.property.read_write()
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == []
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == ['192.168.1.2']
+    #
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2', '192.168.1.1'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get()")
+    #
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2', '192.168.1.2'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get() is None
+    api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.set('255.255.255.255')
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get() == '255.255.255.255'
+    assert api.value.dict() == {'ip_admin_eth0.ip_admin_eth0': ['192.168.1.2', '192.168.1.2'],
+                                'ip_admin_eth0.netmask_admin_eth0': [None, '255.255.255.255']}
+    #
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2', '192.168.1.1'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get()")
+    ret = api.value.dict()
+    assert set(ret.keys()) == set(['ip_admin_eth0.ip_admin_eth0', 'ip_admin_eth0.netmask_admin_eth0'])
+    assert ret['ip_admin_eth0.ip_admin_eth0'] == ['192.168.1.2', '192.168.1.1']
+    assert len(ret['ip_admin_eth0.netmask_admin_eth0']) == 2
+    assert ret['ip_admin_eth0.netmask_admin_eth0'][0] is None
+    assert isinstance(ret['ip_admin_eth0.netmask_admin_eth0'][1], PropertiesOptionError)
+    del ret['ip_admin_eth0.netmask_admin_eth0'][1]
+    del ret['ip_admin_eth0.netmask_admin_eth0'][0]
+    del ret['ip_admin_eth0.netmask_admin_eth0']
+    #
+    api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.set('255.255.255.255')
+    ret = api.value.dict()
+    assert set(ret.keys()) == set(['ip_admin_eth0.ip_admin_eth0', 'ip_admin_eth0.netmask_admin_eth0'])
+    assert ret['ip_admin_eth0.ip_admin_eth0'] == ['192.168.1.2', '192.168.1.1']
+    assert len(ret['ip_admin_eth0.netmask_admin_eth0']) == 2
+    assert ret['ip_admin_eth0.netmask_admin_eth0'][0] == '255.255.255.255'
+    assert isinstance(ret['ip_admin_eth0.netmask_admin_eth0'][1], PropertiesOptionError)
+    del ret['ip_admin_eth0.netmask_admin_eth0'][1]
+    del ret['ip_admin_eth0.netmask_admin_eth0'][0]
+    del ret['ip_admin_eth0.netmask_admin_eth0']
+
+
 def test_leadership_requires_both():
    ip_admin = StrOption('ip_admin_eth0', "ip réseau autorisé")
    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True,
@ -1037,7 +1216,7 @@ def test_leadership_requires_properties():
    netmask_admin_eth0 = StrOption('netmask_admin_eth0', "masque du sous-réseau", multi=True,
                                   requires=[{'option': ip_admin_eth0, 'expected': '192.168.1.1', 'action': 'disabled'}])
    Leadership('ip_admin_eth0', '', [ip_admin_eth0, netmask_admin_eth0], properties=('hidden',),
-                 requires=[{'option': ip_admin, 'expected': '192.168.1.1', 'action': 'disabled'}])
+               requires=[{'option': ip_admin, 'expected': '192.168.1.1', 'action': 'disabled'}])


 def test_leadership_requires_leader():
@ -1068,6 +1247,34 @@ def test_leadership_requires_leader():
    assert api.value.dict() == {'activate': False}


+def test_leadership_requires_leader_callback():
+    activate = BoolOption('activate', "Activer l'accès au réseau", True)
+    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True,
+                              requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(activate)), 'expected': False, 'action': 'disabled'}])
+    netmask_admin_eth0 = StrOption('netmask_admin_eth0', "masque du sous-réseau", multi=True)
+    interface1 = Leadership('ip_admin_eth0', '', [ip_admin_eth0, netmask_admin_eth0])
+    maconfig = OptionDescription('toto', '', [activate, interface1])
+    api = Config(maconfig)
+    api.property.read_write()
+    #
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == []
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == ['192.168.1.2']
+    #
+    api.option('activate').value.set(False)
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.ip_admin_eth0').value.get()")
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get()")
+    #
+    api.option('activate').value.set(True)
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    #
+    api.option('activate').value.set(False)
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.ip_admin_eth0').value.get()")
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get()")
+    assert api.value.dict() == {'activate': False}
+
+
 def test_leadership_requires_leadership():
    activate = BoolOption('activate', "Activer l'accès au réseau", True)
    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True)
@ -1096,6 +1303,34 @@ def test_leadership_requires_leadership():
    assert api.value.dict() == {'activate': False}


+def test_leadership_requires_leadership_callback():
+    activate = BoolOption('activate', "Activer l'accès au réseau", True)
+    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True)
+    netmask_admin_eth0 = StrOption('netmask_admin_eth0', "masque du sous-réseau", multi=True)
+    interface1 = Leadership('ip_admin_eth0', '', [ip_admin_eth0, netmask_admin_eth0],
+                            requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(activate)), 'expected': False, 'action': 'disabled'}])
+    maconfig = OptionDescription('toto', '', [activate, interface1])
+    api = Config(maconfig)
+    api.property.read_write()
+    #
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == []
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == ['192.168.1.2']
+    #
+    api.option('activate').value.set(False)
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.ip_admin_eth0').value.get()")
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get()")
+    #
+    api.option('activate').value.set(True)
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    #
+    api.option('activate').value.set(False)
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.ip_admin_eth0').value.get()")
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get()")
+    assert api.value.dict() == {'activate': False}
+
+
 def test_leadership_requires_no_leader():
    activate = BoolOption('activate', "Activer l'accès au réseau", True)
    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True)
@ -1125,6 +1360,40 @@ def test_leadership_requires_no_leader():
    assert api.value.dict() == {'ip_admin_eth0.ip_admin_eth0': ['192.168.1.2', '192.168.1.1'], 'activate': False}


+def test_leadership_requires_no_leader_callback():
+    activate = BoolOption('activate', "Activer l'accès au réseau", True)
+    ip_admin_eth0 = StrOption('ip_admin_eth0', "ip réseau autorisé", multi=True)
+    netmask_admin_eth0 = StrOption('netmask_admin_eth0', "masque du sous-réseau", multi=True,
+                                   requires=[{'callback': calc_value, 'callback_params': Params(ParamOption(activate)), 'expected': False, 'action': 'disabled'}])
+    interface1 = Leadership('ip_admin_eth0', '', [ip_admin_eth0, netmask_admin_eth0])
+    maconfig = OptionDescription('toto', '', [activate, interface1])
+    api = Config(maconfig)
+    api.property.read_write()
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == []
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2'])
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == ['192.168.1.2']
+    api.option('activate').value.set(False)
+    api.option('ip_admin_eth0.ip_admin_eth0').value.set(['192.168.1.2', '192.168.1.1'])
+    assert api.option('ip_admin_eth0.ip_admin_eth0').value.get() == ['192.168.1.2', '192.168.1.1']
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get()")
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get()")
+    api.option('activate').value.set(True)
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get() is None
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get() is None
+    api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.set('255.255.255.255')
+    assert api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get() == '255.255.255.255'
+    api.option('activate').value.set(False)
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 0).value.get()")
+    raises(PropertiesOptionError, "api.option('ip_admin_eth0.netmask_admin_eth0', 1).value.get()")
+    dico = api.value.dict()
+    assert set(dico.keys()) == {'activate', 'ip_admin_eth0.ip_admin_eth0', 'ip_admin_eth0.netmask_admin_eth0'}
+    dico['ip_admin_eth0.ip_admin_eth0'] == ['192.168.1.2', '192.168.1.1']
+    dico['activate'] == False
+    del dico['ip_admin_eth0.netmask_admin_eth0'][1]
+    del dico['ip_admin_eth0.netmask_admin_eth0'][0]
+
+
 def test_leadership_requires_complet():
    optiontoto = StrOption('unicodetoto', "Unicode leader")
    option = StrOption('unicode', "Unicode leader", multi=True)
@ -1212,6 +1481,106 @@ def test_leadership_requires_complet():
    del dico['options.unicode.unicode7']


+def test_leadership_requires_complet_callback():
+    optiontoto = StrOption('unicodetoto', "Unicode leader")
+    option = StrOption('unicode', "Unicode leader", multi=True)
+    option1 = StrOption('unicode1', "Unicode follower 1", multi=True)
+    option2 = StrOption('unicode2', "Values 'test' must show 'Unicode follower 3'", multi=True)
+    option3 = StrOption('unicode3', "Unicode follower 3", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(option)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True}],
+                        multi=True)
+    option4 = StrOption('unicode4', "Unicode follower 4", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(option2)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True}],
+                        multi=True)
+    option5 = StrOption('unicode5', "Unicode follower 5", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(optiontoto)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True}],
+                        multi=True)
+    option6 = StrOption('unicode6', "Unicode follower 6", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(optiontoto)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True},
+                                                                    {'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(option2)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True}],
+                        multi=True)
+    option7 = StrOption('unicode7', "Unicode follower 7", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(option2)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True},
+                                                                    {'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(optiontoto)),
+                                                                     'expected': u'test',
+                                                                     'action': 'hidden',
+                                                                     'inverse': True}],
+                        multi=True)
+    descr1 = Leadership("unicode", "Common configuration 1",
+                        [option, option1, option2, option3, option4, option5, option6, option7])
+    descr = OptionDescription("options", "Common configuration 2", [descr1, optiontoto])
+    descr = OptionDescription("unicode1_leadership_requires", "Leader followers with Unicode follower 3 hidden when Unicode follower 2 is test", [descr])
+    config = Config(descr)
+    config.property.read_write()
+    config.option('options.unicode.unicode').value.set(['test', 'trah'])
+    config.option('options.unicode.unicode2', 0).value.set('test')
+    dico = config.value.dict()
+    assert dico.keys() == set(['options.unicode.unicode', 'options.unicode.unicode1', 'options.unicode.unicode2', 'options.unicode.unicode3', 'options.unicode.unicode4', 'options.unicode.unicode5', 'options.unicode.unicode6', 'options.unicode.unicode7', 'options.unicodetoto'])
+    assert dico['options.unicode.unicode'] == ['test', 'trah']
+    assert dico['options.unicode.unicode1'] == [None, None]
+    assert dico['options.unicode.unicode2'] == ['test', None]
+    assert dico['options.unicode.unicode3'][0] is None
+    assert isinstance(dico['options.unicode.unicode3'][1], PropertiesOptionError)
+    assert dico['options.unicode.unicode4'][0] is None
+    assert isinstance(dico['options.unicode.unicode4'][1], PropertiesOptionError)
+    assert dico['options.unicodetoto'] is None
+    del dico['options.unicode.unicode3'][1]
+    del dico['options.unicode.unicode3']
+    del dico['options.unicode.unicode4'][1]
+    del dico['options.unicode.unicode4']
+    del dico['options.unicode.unicode5'][0]
+    del dico['options.unicode.unicode5'][0]
+    del dico['options.unicode.unicode6'][0]
+    del dico['options.unicode.unicode6'][0]
+    del dico['options.unicode.unicode7'][0]
+    del dico['options.unicode.unicode7'][0]
+    #
+    config.option('options.unicodetoto').value.set('test')
+    dico = config.value.dict()
+    assert dico.keys() == set(['options.unicode.unicode', 'options.unicode.unicode1', 'options.unicode.unicode2', 'options.unicode.unicode3', 'options.unicode.unicode4', 'options.unicode.unicode5', 'options.unicode.unicode6', 'options.unicode.unicode7', 'options.unicodetoto'])
+    assert dico['options.unicode.unicode'] == ['test', 'trah']
+    assert dico['options.unicode.unicode1'] == [None, None]
+    assert dico['options.unicode.unicode2'] == ['test', None]
+    assert dico['options.unicode.unicode3'][0] is None
+    assert isinstance(dico['options.unicode.unicode3'][1], PropertiesOptionError)
+    assert dico['options.unicode.unicode4'][0] is None
+    assert isinstance(dico['options.unicode.unicode4'][1], PropertiesOptionError)
+    assert dico['options.unicode.unicode5'] == [None, None]
+    assert dico['options.unicode.unicode6'][0] is None
+    assert isinstance(dico['options.unicode.unicode6'][1], PropertiesOptionError)
+    assert dico['options.unicode.unicode7'][0] is None
+    assert isinstance(dico['options.unicode.unicode7'][1], PropertiesOptionError)
+    assert dico['options.unicodetoto'] == 'test'
+    del dico['options.unicode.unicode3'][1]
+    del dico['options.unicode.unicode3']
+    del dico['options.unicode.unicode4'][1]
+    del dico['options.unicode.unicode4']
+    del dico['options.unicode.unicode6'][1]
+    del dico['options.unicode.unicode6']
+    del dico['options.unicode.unicode7'][1]
+    del dico['options.unicode.unicode7']
+
+
 def test_leadership_requires_transitive():
    optiontoto = StrOption('unicodetoto', "Unicode leader")
    option = StrOption('unicode', "Unicode leader", multi=True)
@ -1325,3 +1694,124 @@ def test_leadership_requires_transitive():
    del (dico['options.unicode.unicode4'][2])
    del (dico['options.unicode.unicode4'][1])
    del (dico['options.unicode.unicode4'][0])
+
+
+def test_leadership_requires_transitive_callback():
+    optiontoto = StrOption('unicodetoto', "Unicode leader")
+    option = StrOption('unicode', "Unicode leader", multi=True)
+    option1 = StrOption('unicode1', "Unicode follower 1", multi=True)
+    option2 = StrOption('unicode2', "Unicode follower 2", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(optiontoto)),
+                                                                     'expected': u'test',
+                                                                     'action': 'disabled',
+                                                                     'transitive': True,
+                                                                     'inverse': True}],
+                        multi=True)
+    option3 = StrOption('unicode3', "Unicode follower 3", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(option2)),
+                                                                     'expected': u'test',
+                                                                     'action': 'disabled',
+                                                                     'transitive': True,
+                                                                     'inverse': True}],
+                        multi=True)
+    option4 = StrOption('unicode4', "Unicode follower 4", requires=[{'callback': calc_value,
+                                                                     'callback_params': Params(ParamOption(option3)),
+                                                                     'expected': u'test',
+                                                                     'action': 'disabled',
+                                                                     'transitive': True,
+                                                                     'inverse': True}],
+                        multi=True)
+    descr1 = Leadership("unicode", "Common configuration 1",
+                        [option, option1, option2, option3, option4])
+    descr = OptionDescription("options", "Common configuration 2", [descr1, optiontoto])
+    descr = OptionDescription("unicode1", "", [descr])
+    config = Config(descr)
+    config.property.read_write()
+    assert config.value.dict() == {'options.unicode.unicode': [], 'options.unicode.unicode1': [], 'options.unicode.unicode2': [], 'options.unicode.unicode3': [], 'options.unicode.unicode4': [], 'options.unicodetoto': None}
+    #
+    config.option('options.unicodetoto').value.set('test')
+    assert config.value.dict() == {'options.unicode.unicode': [], 'options.unicode.unicode1': [], 'options.unicode.unicode2': [], 'options.unicode.unicode3': [], 'options.unicode.unicode4': [], 'options.unicodetoto': 'test'}
+    #
+    config.option('options.unicode.unicode').value.set(['a', 'b', 'c'])
+    dico = config.value.dict()
+    assert list(dico.keys()) == ['options.unicode.unicode', 'options.unicode.unicode1', 'options.unicode.unicode2', 'options.unicode.unicode3', 'options.unicode.unicode4', 'options.unicodetoto']
+    assert dico['options.unicodetoto'] == 'test'
+    assert dico['options.unicode.unicode'] == ['a', 'b', 'c']
+    assert dico['options.unicode.unicode1'] == [None, None, None]
+    assert dico['options.unicode.unicode2'] == [None, None, None]
+    assert isinstance(dico['options.unicode.unicode3'][0], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode3'][1], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode3'][2], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][0], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][1], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][2], PropertiesOptionError)
+    del (dico['options.unicode.unicode3'][2])
+    del (dico['options.unicode.unicode3'][1])
+    del (dico['options.unicode.unicode3'][0])
+    del (dico['options.unicode.unicode4'][2])
+    del (dico['options.unicode.unicode4'][1])
+    del (dico['options.unicode.unicode4'][0])
+    #
+    config.option('options.unicode.unicode2', 1).value.set('test')
+    config.option('options.unicode.unicode3', 1).value.set('test')
+    dico = config.value.dict()
+    assert list(dico.keys()) == ['options.unicode.unicode', 'options.unicode.unicode1', 'options.unicode.unicode2', 'options.unicode.unicode3', 'options.unicode.unicode4', 'options.unicodetoto']
+    assert dico['options.unicodetoto'] == 'test'
+    assert dico['options.unicode.unicode'] == ['a', 'b', 'c']
+    assert dico['options.unicode.unicode1'] == [None, None, None]
+    assert dico['options.unicode.unicode2'] == [None, 'test', None]
+    assert isinstance(dico['options.unicode.unicode3'][0], PropertiesOptionError)
+    assert dico['options.unicode.unicode3'][1] == 'test'
+    assert isinstance(dico['options.unicode.unicode3'][2], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][0], PropertiesOptionError)
+    assert dico['options.unicode.unicode4'][1] == None
+    assert isinstance(dico['options.unicode.unicode4'][2], PropertiesOptionError)
+    del (dico['options.unicode.unicode3'][2])
+    del (dico['options.unicode.unicode3'][1])
+    del (dico['options.unicode.unicode3'][0])
+    del (dico['options.unicode.unicode4'][2])
+    del (dico['options.unicode.unicode4'][1])
+    del (dico['options.unicode.unicode4'][0])
+    #
+    config.option('options.unicode.unicode2', 1).value.set('rah')
+    dico = config.value.dict()
+    assert list(dico.keys()) == ['options.unicode.unicode', 'options.unicode.unicode1', 'options.unicode.unicode2', 'options.unicode.unicode3', 'options.unicode.unicode4', 'options.unicodetoto']
+    assert dico['options.unicodetoto'] == 'test'
+    assert dico['options.unicode.unicode'] == ['a', 'b', 'c']
+    assert dico['options.unicode.unicode1'] == [None, None, None]
+    assert dico['options.unicode.unicode2'] == [None, 'rah', None]
+    assert isinstance(dico['options.unicode.unicode3'][0], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode3'][1], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode3'][2], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][0], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][1], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][2], PropertiesOptionError)
+    del (dico['options.unicode.unicode3'][2])
+    del (dico['options.unicode.unicode3'][1])
+    del (dico['options.unicode.unicode3'][0])
+    del (dico['options.unicode.unicode4'][2])
+    del (dico['options.unicode.unicode4'][1])
+    del (dico['options.unicode.unicode4'][0])
+    #
+    config.option('options.unicode.unicode2', 1).value.set('test')
+    config.option('options.unicodetoto').value.set('rah')
+    dico = config.value.dict()
+    assert list(dico.keys()) == ['options.unicode.unicode', 'options.unicode.unicode1', 'options.unicode.unicode2', 'options.unicode.unicode3', 'options.unicode.unicode4', 'options.unicodetoto']
+    assert dico['options.unicodetoto'] == 'rah'
+    assert dico['options.unicode.unicode'] == ['a', 'b', 'c']
+    assert dico['options.unicode.unicode1'] == [None, None, None]
+    assert isinstance(dico['options.unicode.unicode3'][0], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode3'][1], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode3'][2], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][0], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][1], PropertiesOptionError)
+    assert isinstance(dico['options.unicode.unicode4'][2], PropertiesOptionError)
+    del (dico['options.unicode.unicode2'][2])
+    del (dico['options.unicode.unicode2'][1])
+    del (dico['options.unicode.unicode2'][0])
+    del (dico['options.unicode.unicode3'][2])
+    del (dico['options.unicode.unicode3'][1])
+    del (dico['options.unicode.unicode3'][0])
+    del (dico['options.unicode.unicode4'][2])
+    del (dico['options.unicode.unicode4'][1])
+    del (dico['options.unicode.unicode4'][0])
--- a/tiramisu/api.py
+++ b/tiramisu/api.py
@ -465,8 +465,9 @@ class _TiramisuOptionValueOption:
        if isinstance(value, list):
            while undefined in value:
                idx = value.index(undefined)
-                value[idx] = values.getdefaultvalue(self._option_bag,
-                                                    force_index=idx)
+                soption_bag = self._option_bag.copy()
+                soption_bag.index = idx
+                value[idx] = values.getdefaultvalue(soption_bag)
        elif value == undefined:
            value = values.getdefaultvalue(self._option_bag)
        self._subconfig.setattr(value,
--- a/tiramisu/autolib.py
+++ b/tiramisu/autolib.py
@ -90,11 +90,11 @@ def manager_callback(callbk: Union[ParamOption, ParamValue],
            return value[index]
        return value
    except PropertiesOptionError as err:
-        # raise because must not add value None in carry_out_calculation
+        # raise PropertiesOptionError (which is catched) because must not add value None in carry_out_calculation
        if callbk.notraisepropertyerror:
            raise err
        raise ConfigError(_('unable to carry out a calculation for "{}"'
-                            ', {}').format(option.impl_get_display_name(), err))
+                            ', {}').format(option.impl_get_display_name(), err), err)


 def carry_out_calculation(option,
--- a/tiramisu/error.py
+++ b/tiramisu/error.py
@ -116,7 +116,7 @@ class PropertiesOptionError(AttributeError):
                                        self._name,
                                        prop_msg,
                                        msg))
-        del self._requires, self._opt_type, self._name, self._option_bag
+        del self._requires, self._opt_type, self._name
        del self._settings, self._orig_opt
        return self.msg

@ -127,7 +127,11 @@ class ConfigError(Exception):
    """attempt to change an option's owner without a value
    or in case of `_cfgimpl_descr` is None
    or if a calculation cannot be carried out"""
-    pass
+    def __init__(self,
+                 exp,
+                 ori_err=None):
+        super().__init__(exp)
+        self.ori_err = ori_err


 class ConflictError(Exception):
--- a/tiramisu/function.py
+++ b/tiramisu/function.py
@ -49,9 +49,12 @@ class Param:


 class ParamOption(Param):
-    __slots__ = ('option', 'notraisepropertyerror')
-    def __init__(self, option, notraisepropertyerror=False):
-        if not hasattr(option, 'impl_is_symlinkoption'):
+    __slots__ = ('option',
+                 'notraisepropertyerror')
+    def __init__(self,
+                 option: 'Option',
+                 notraisepropertyerror: bool=False) -> None:
+        if __debug__ and not hasattr(option, 'impl_is_symlinkoption'):
            raise ValueError(_('paramoption needs an option not {}').format(type(option)))
        if option.impl_is_symlinkoption():
            cur_opt = option.impl_getopt()
@ -95,6 +98,7 @@ def calc_value(*args: List[Any],
               join: Optional[str]=None,
               min_args_len: Optional[int]=None,
               operator: Optional[str]=None,
+               index: Optional[int]=None,
               **kwargs) -> Any:
    """calculate value
    :param multi: value returns must be a list of value
@ -181,7 +185,6 @@ def calc_value(*args: List[Any],
    >>> cfg.value.dict()
    {'val1': 'val1', 'val2': 'val1', 'val3': ['val1']}

-
    * you want to join two values with '.'
    >>> from tiramisu import calc_value, StrOption, OptionDescription, Config, Params, ParamOption, ParamValue
    >>> val1 = StrOption('val1', "", 'val1')
@ -305,6 +308,11 @@ def calc_value(*args: List[Any],
            value = None
        else:
            value = value[0]
+            if isinstance(value, list) and index is not None:
+                if len(value) > index:
+                    value = value[index]
+                else:
+                    value = None
    elif None in value and not allow_none:
        value = []
    elif remove_duplicate_value:
--- a/tiramisu/log.py
+++ b/tiramisu/log.py
@ -15,9 +15,16 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # ____________________________________________________________
-from logging import getLogger
+from logging import getLogger, DEBUG, basicConfig, StreamHandler, Formatter
+import os


 log = getLogger('tiramisu')
-# import logging
-# logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.DEBUG)
+if os.environ.get('TIRAMISU_DEBUG') == 'True':
+    log.setLevel(DEBUG)
+    handler = StreamHandler()
+    handler.setLevel(DEBUG)
+    formatter = Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+    handler.setFormatter(formatter)
+
+    log.addHandler(handler)
--- a/tiramisu/option/baseoption.py
+++ b/tiramisu/option/baseoption.py
@ -170,7 +170,7 @@ class Base:
                    param.option._add_dependency(self)
                    if type_ == 'validator':
                        self._has_dependency = True
-        is_multi = self.impl_is_dynoptiondescription() or self.impl_is_multi()
+        is_multi = self.impl_is_optiondescription() or self.impl_is_multi()
        func_args, func_kwargs, func_positional, func_keyword = self._get_function_args(calculator)
        calculator_args, calculator_kwargs = self._get_parameters_args(calculator_params, add_value)
        # remove knowned kwargs
@ -253,13 +253,14 @@ class Base:
    def _impl_set_callback(self,
                           callback: Callable,
                           callback_params: Optional[Params]=None) -> None:
-        if callback is None and callback_params is not None:
-            raise ValueError(_("params defined for a callback function but "
-                               "no callback defined"
-                               ' yet for option "{0}"').format(
-                                   self.impl_getname()))
-        self._validate_calculator(callback,
-                                  callback_params)
+        if __debug__:
+            if callback is None and callback_params is not None:
+                raise ValueError(_("params defined for a callback function but "
+                                   "no callback defined"
+                                   ' yet for option "{0}"').format(
+                                       self.impl_getname()))
+            self._validate_calculator(callback,
+                                      callback_params)
        if callback is not None:
            callback_params = self._build_calculator_params(callback,
                                                            callback_params,
@ -443,17 +444,25 @@ def validate_requires_arg(new_option: BaseOption,
                     the description of the requires dictionary
    """
    def get_option(require):
-        option = require['option']
-        if option == 'self':
-            option = new_option
-        if not isinstance(option, BaseOption):
-            raise ValueError(_('malformed requirements '
-                               'must be an option in option {0}').format(name))
-        if not multi and option.impl_is_multi():
-            raise ValueError(_('malformed requirements '
-                               'multi option must not set '
-                               'as requires of non multi option {0}').format(name))
-        option._add_dependency(new_option)
+        if 'option' in require:
+            option = require['option']
+            if option == 'self':
+                option = new_option
+            if __debug__:
+                if not isinstance(option, BaseOption):
+                    raise ValueError(_('malformed requirements '
+                                       'must be an option in option {0}').format(name))
+                if not multi and option.impl_is_multi():
+                    raise ValueError(_('malformed requirements '
+                                       'multi option must not set '
+                                       'as requires of non multi option {0}').format(name))
+            option._add_dependency(new_option)
+        else:
+            callback = require['callback']
+            callback_params = new_option._build_calculator_params(callback,
+                                                                  require.get('callback_params'),
+                                                                  'callback')
+            option = (callback, callback_params)
        return option

    def _set_expected(action,
@ -482,11 +491,11 @@ def validate_requires_arg(new_option: BaseOption,
        operator = get_operator(require)
        if isinstance(expected, list):
            for exp in expected:
-                if set(exp.keys()) != {'option', 'value'}:
+                if __debug__ and set(exp.keys()) != {'option', 'value'}:
                    raise ValueError(_('malformed requirements expected must have '
                                       'option and value for option {0}').format(name))
                option = get_option(exp)
-                if option is not None:
+                if __debug__:
                    try:
                        option._validate(exp['value'], undefined)
                    except ValueError as err:
@ -502,7 +511,7 @@ def validate_requires_arg(new_option: BaseOption,
                              operator)
        else:
            option = get_option(require)
-            if expected is not None:
+            if __debug__ and not isinstance(option, tuple) and expected is not None:
                try:
                    option._validate(expected, undefined)
                except ValueError as err:
@ -560,25 +569,29 @@ def validate_requires_arg(new_option: BaseOption,
    # start parsing all requires given by user (has dict)
    # transforme it to a tuple
    for require in requires:
-        if not isinstance(require, dict):
-            raise ValueError(_("malformed requirements type for option:"
-                               " {0}, must be a dict").format(name))
-        valid_keys = ('option', 'expected', 'action', 'inverse', 'transitive',
-                      'same_action', 'operator')
-        unknown_keys = frozenset(require.keys()) - frozenset(valid_keys)
-        if unknown_keys != frozenset():
-            raise ValueError(_('malformed requirements for option: {0}'
-                             ' unknown keys {1}, must only '
-                             '{2}').format(name,
-                                           unknown_keys,
-                                           valid_keys))
-        # prepare all attributes
-        if not ('expected' in require and isinstance(require['expected'], list)) and \
-                not ('option' in require and 'expected' in require) or \
-                'action' not in require:
-            raise ValueError(_("malformed requirements for option: {0}"
-                               " require must have option, expected and"
-                               " action keys").format(name))
+        if __debug__:
+            if not isinstance(require, dict):
+                raise ValueError(_("malformed requirements type for option:"
+                                   " {0}, must be a dict").format(name))
+            valid_keys = ('option', 'expected', 'action', 'inverse', 'transitive',
+                          'same_action', 'operator', 'callback', 'callback_params')
+            unknown_keys = frozenset(require.keys()) - frozenset(valid_keys)
+            if unknown_keys != frozenset():
+                raise ValueError(_('malformed requirements for option: {0}'
+                                 ' unknown keys {1}, must only '
+                                 '{2}').format(name,
+                                               unknown_keys,
+                                               valid_keys))
+            # {'expected': ..., 'option': ..., 'action': ...}
+            # {'expected': [{'option': ..., 'value': ...}, ...}], 'action': ...}
+            # {'expected': ..., 'callback': ..., 'action': ...}
+            if not 'expected' in require or not 'action' in require or \
+                    not (isinstance(require['expected'], list) or \
+                        'option' in require or \
+                        'callback' in require):
+                raise ValueError(_("malformed requirements for option: {0}"
+                                   " require must have option, expected and"
+                                   " action keys").format(name))
        action = get_action(require)
        config_action.add(action)
        if action not in ret_requires:
--- a/tiramisu/option/leadership.py
+++ b/tiramisu/option/leadership.py
@ -109,7 +109,7 @@ class Leadership(OptionDescription):
            for requires_ in getattr(self, '_requires', ()):
                for require in requires_:
                    for require_opt, values in require[0]:
-                        if require_opt.impl_is_multi() and require_opt.impl_get_leadership():
+                        if not isinstance(require_opt, tuple) and require_opt.impl_is_multi() and require_opt.impl_get_leadership():
                            raise ValueError(_('malformed requirements option "{0}" '
                                               'must not be in follower for "{1}"').format(
                                                   require_opt.impl_getname(),
--- a/tiramisu/option/optiondescription.py
+++ b/tiramisu/option/optiondescription.py
@ -139,7 +139,7 @@ class CacheOptionDescription(BaseOption):
                                # * current option must be a follower (and only a follower)
                                # * option in require and current option must be in same leadership
                                for require_opt, values in require[0]:
-                                    if require_opt.impl_is_multi():
+                                    if not isinstance(require_opt, tuple) and require_opt.impl_is_multi():
                                        if is_follower is None:
                                            is_follower = option.impl_is_follower()
                                            if is_follower:
--- a/tiramisu/setting.py
+++ b/tiramisu/setting.py
@ -509,43 +509,59 @@ class Settings(object):
                exps, action, inverse, transitive, same_action, operator = require
                breaked = False
                for option, expected in exps:
-                    if option.issubdyn():
-                        option = option.to_dynoption(option_bag.option.rootpath,
-                                                     option_bag.option.impl_getsuffix())
-                    reqpath = option.impl_getpath()
-                    #FIXME too later!
-                    if reqpath.startswith(option_bag.path + '.'):
-                        raise RequirementError(_("malformed requirements "
-                                                 "imbrication detected for option:"
-                                                 " '{0}' with requirement on: "
-                                                 "'{1}'").format(option_bag.path, reqpath))
-                    idx = None
-                    is_indexed = False
-                    if option.impl_is_follower():
-                        idx = option_bag.index
-                        if idx is None:
+                    if not isinstance(option, tuple):
+                        if option.issubdyn():
+                            option = option.to_dynoption(option_bag.option.rootpath,
+                                                         option_bag.option.impl_getsuffix())
+                        reqpath = option.impl_getpath()
+                        if __debug__ and reqpath.startswith(option_bag.path + '.'):
+                            # FIXME too later!
+                            raise RequirementError(_("malformed requirements "
+                                                     "imbrication detected for option:"
+                                                     " '{0}' with requirement on: "
+                                                     "'{1}'").format(option_bag.path, reqpath))
+                        idx = None
+                        is_indexed = False
+                        if option.impl_is_follower():
+                            idx = option_bag.index
+                            if idx is None:
+                                continue
+                        elif option.impl_is_leader() and option_bag.index is None:
                            continue
-                    elif option.impl_is_leader() and option_bag.index is None:
-                        continue
-                    elif option.impl_is_multi() and option_bag.index is not None:
-                        is_indexed = True
-                    config_bag = option_bag.config_bag.copy()
-                    soption_bag = OptionBag()
-                    soption_bag.set_option(option,
-                                           reqpath,
-                                           idx,
-                                           config_bag)
-                    if option_bag.option == option:
-                        soption_bag.config_bag.unrestraint()
-                        soption_bag.config_bag.remove_validation()
-                        soption_bag.apply_requires = False
+                        elif option.impl_is_multi() and option_bag.index is not None:
+                            is_indexed = True
+                        config_bag = option_bag.config_bag.copy()
+                        soption_bag = OptionBag()
+                        soption_bag.set_option(option,
+                                               reqpath,
+                                               idx,
+                                               config_bag)
+                        if option_bag.option == option:
+                            soption_bag.config_bag.unrestraint()
+                            soption_bag.config_bag.remove_validation()
+                            soption_bag.apply_requires = False
+                        else:
+                            soption_bag.config_bag.properties = soption_bag.config_bag.true_properties
+                            soption_bag.config_bag.set_permissive()
                    else:
-                        soption_bag.config_bag.properties = soption_bag.config_bag.true_properties
-                        soption_bag.config_bag.set_permissive()
+                        if not option_bag.option.impl_is_optiondescription() and option_bag.option.impl_is_follower():
+                            idx = option_bag.index
+                            if idx is None:
+                                continue
+                        is_indexed = False
                    try:
-                        value = context.getattr(reqpath,
-                                                soption_bag)
-                    except PropertiesOptionError as err:
+                        if not isinstance(option, tuple):
+                            value = context.getattr(reqpath,
+                                                    soption_bag)
+                        else:
+                            value = context.cfgimpl_get_values().carry_out_calculation(option_bag,
+                                                                                       option[0],
+                                                                                       option[1])
+                    except (PropertiesOptionError, ConfigError) as err:
+                        if isinstance(err, ConfigError):
+                            if not isinstance(err.ori_err, PropertiesOptionError):
+                                raise err
+                            err = err.ori_err
                        properties = err.proptype
                        # if not transitive, properties must be verify in current requires
                        # otherwise if same_action, property must be in properties
@ -586,13 +602,19 @@ class Settings(object):
                                inverse and value not in expected):
                            if operator != 'and':
                                if readable:
-                                    if not inverse:
-                                        msg = _('the value of "{0}" is {1}')
+                                    display_value = display_list(expected, 'or', add_quote=True)
+                                    if isinstance(option, tuple):
+                                        if not inverse:
+                                            msg = _('the calculated value is {0}').format(display_value)
+                                        else:
+                                            msg = _('the calculated value is not {0}').format(display_value)
                                    else:
-                                        msg = _('the value of "{0}" is not {1}')
-                                    calc_properties.setdefault(action, []).append(
-                                        msg.format(option.impl_get_display_name(),
-                                                   display_list(expected, 'or', add_quote=True)))
+                                        name = option.impl_get_display_name()
+                                        if not inverse:
+                                            msg = _('the value of "{0}" is {1}').format(name, display_value)
+                                        else:
+                                            msg = _('the value of "{0}" is not {1}').format(name, display_value)
+                                    calc_properties.setdefault(action, []).append(msg)
                                else:
                                    calc_properties.add(action)
                                    breaked = True
--- a/tiramisu/storage/dictionary/setting.py
+++ b/tiramisu/storage/dictionary/setting.py
@ -32,16 +32,16 @@ class Properties(Cache):

    # properties
    def setproperties(self, path, properties):
-        log.debug('setproperties', path, properties)
+        log.debug('setproperties %s %s', path, properties)
        self._properties[path] = properties

    def getproperties(self, path, default_properties):
        ret = self._properties.get(path, frozenset(default_properties))
-        log.debug('getproperties', path, ret)
+        log.debug('getproperties %s %s', path, ret)
        return ret

    def delproperties(self, path):
-        log.debug('delproperties', path)
+        log.debug('delproperties %s', path)
        if path in self._properties:
            del(self._properties[path])

@ -64,7 +64,7 @@ class Permissives(Cache):
        super(Permissives, self).__init__(storage)

    def setpermissives(self, path, permissives):
-        log.debug('setpermissives', path, permissives)
+        log.debug('setpermissives %s %s', path, permissives)
        if not permissives:
            if path in self._permissives:
                del self._permissives[path]
@ -73,7 +73,7 @@ class Permissives(Cache):

    def getpermissives(self, path=None):
        ret = self._permissives.get(path, frozenset())
-        log.debug('getpermissives', path, ret)
+        log.debug('getpermissives %s %s', path, ret)
        return ret

    def exportation(self):
@ -86,6 +86,6 @@ class Permissives(Cache):
        self._permissives = permissives

    def delpermissive(self, path):
-        log.debug('delpermissive', path)
+        log.debug('delpermissive %s', path)
        if path in self._permissives:
            del(self._permissives[path])
--- a/tiramisu/storage/dictionary/value.py
+++ b/tiramisu/storage/dictionary/value.py
@ -76,7 +76,7 @@ class Values(Cache):
        """set value for a path
        a specified value must be associated to an owner
        """
-        log.debug('setvalue', path, value, owner, index, id(self))
+        log.debug('setvalue %s %s %s %s %s', path, value, owner, index, id(self))
        values = []
        vidx = None

@ -97,7 +97,7 @@ class Values(Cache):
        return: boolean
        """
        has_path = path in self._values[0]
-        log.debug('hasvalue', path, index, has_path, id(self))
+        log.debug('hasvalue %s %s %s %s', path, index, has_path, id(self))
        if index is None:
            return has_path
        elif has_path:
@ -110,7 +110,7 @@ class Values(Cache):
        """
        _values == ((path1, path2), ((idx1_1, idx1_2), None), ((value1_1, value1_2), value2), ((owner1_1, owner1_2), owner2))
        """
-        log.debug('reduce_index', path, index, id(self))
+        log.debug('reduce_index %s %s %s', path, index, id(self))
        path_idx = self._values[0].index(path)
        # get the "index" position
        subidx = self._values[1][path_idx].index(index)
@ -129,7 +129,7 @@ class Values(Cache):
                         path,
                         index,
                         commit):
-        log.debug('resetvalue_index', path, index, id(self))
+        log.debug('resetvalue_index %s %s %s', path, index, id(self))
        def _resetvalue(nb):
            values_idx = list(values[nb])
            del(values_idx[path_idx])
@ -163,7 +163,7 @@ class Values(Cache):
                   commit):
        """remove value means delete value in storage
        """
-        log.debug('resetvalue', path, id(self))
+        log.debug('resetvalue %s %s', path, id(self))
        def _resetvalue(nb):
            lst = list(self._values[nb])
            lst.pop(idx)
@ -216,7 +216,7 @@ class Values(Cache):
                                      with_value)
        if owner is undefined:
            owner = default
-        log.debug('getvalue', path, index, value, owner, id(self))
+        log.debug('getvalue %s %s %s %s %s', path, index, value, owner, id(self))
        if with_value:
            return owner, value
        else:
--- a/tiramisu/storage/sqlite3/setting.py
+++ b/tiramisu/storage/sqlite3/setting.py
@ -81,7 +81,7 @@ class Permissives(Sqlite3DB):
    # permissive
    def setpermissives(self, path, permissive):
        path = self._sqlite_encode_path(path)
-        log.debug('setpermissive', path, permissive, id(self))
+        log.debug('setpermissive %s %s %s', path, permissive, id(self))
        self._storage.execute("DELETE FROM permissive WHERE path = ? AND session_id = ?",
                              (path, self._session_id),
                              False)
@ -99,7 +99,7 @@ class Permissives(Sqlite3DB):
            ret = frozenset()
        else:
            ret = frozenset(self._sqlite_decode(permissives[0]))
-        log.debug('getpermissive', path, ret, id(self))
+        log.debug('getpermissive %s %s %s', path, ret, id(self))
        return ret

    def delpermissive(self, path):
--- a/tiramisu/storage/sqlite3/value.py
+++ b/tiramisu/storage/sqlite3/value.py
@ -54,7 +54,7 @@ class Values(Sqlite3DB):
        """set value for an option
        a specified value must be associated to an owner
        """
-        log.debug('setvalue', path, value, owner, index, commit)
+        log.debug('setvalue %s %s %s %s %s', path, value, owner, index, commit)
        path = self._sqlite_encode_path(path)
        if index is not None:
            self.resetvalue_index(path,
@ -81,7 +81,7 @@ class Values(Sqlite3DB):
        """if opt has a value
        return: boolean
        """
-        log.debug('hasvalue', path, index)
+        log.debug('hasvalue %s %s', path, index)
        path = self._sqlite_encode_path(path)
        return self._sqlite_select(path, index) is not None

@ -91,7 +91,7 @@ class Values(Sqlite3DB):
        _values == ((path1, path2), ((idx1_1, idx1_2), None),
                    ((value1_1, value1_2), value2), ((owner1_1, owner1_2), owner2))
        """
-        log.debug('reduce_index', path, index, id(self))
+        log.debug('reduce_index %s %s %s', path, index, id(self))
        self._storage.execute("UPDATE value SET idx = ? WHERE path = ? and idx = ? "
                              "AND session_id = ?",
                              (index - 1, path, index, self._session_id))
@ -102,7 +102,7 @@ class Values(Sqlite3DB):
                         commit=True):
        """remove value means delete value in storage
        """
-        log.debug('resetvalue_index', path, index, commit)
+        log.debug('resetvalue_index %s %s %s', path, index, commit)
        path = self._sqlite_encode_path(path)
        self._storage.execute("DELETE FROM value WHERE path = ? AND session_id = ? AND idx = ?",
                              (path, self._session_id, index),
@ -113,7 +113,7 @@ class Values(Sqlite3DB):
                   commit):
        """remove value means delete value in storage
        """
-        log.debug('resetvalue', path, commit)
+        log.debug('resetvalue %s %s', path, commit)
        path = self._sqlite_encode_path(path)
        self._storage.execute("DELETE FROM value WHERE path = ? AND session_id = ?",
                              (path, self._session_id),
@ -126,7 +126,7 @@ class Values(Sqlite3DB):
                 index=None):
        """change owner for an option
        """
-        log.debug('setowner', path, owner, index)
+        log.debug('setowner %s %s %s', path, owner, index)
        path = self._sqlite_encode_path(path)
        if index is None:
            self._storage.execute("UPDATE value SET owner = ? WHERE path = ? AND session_id = ?",
@ -143,7 +143,7 @@ class Values(Sqlite3DB):
        """get owner for an option
        return: owner object
        """
-        log.debug('getowner', path, default, index, with_value)
+        log.debug('getowner %s %s %s %s', path, default, index, with_value)
        path = self._sqlite_encode_path(path)
        request = "SELECT owner, value FROM value WHERE path = ? AND session_id = ?"
        if index is not None:
@ -178,7 +178,7 @@ class Values(Sqlite3DB):
        :param key: information's key (ex: "help", "doc"
        :param value: information's value (ex: "the help string")
        """
-        log.debug('set_information', key, value)
+        log.debug('set_information %s %s', key, value)
        path = self._sqlite_encode_path(path)
        self._storage.execute("DELETE FROM information WHERE key = ? AND session_id = ? AND path = ?",
                             (key, self._session_id, path),
@ -191,7 +191,7 @@ class Values(Sqlite3DB):

        :param key: the item string (ex: "help")
        """
-        log.debug('get_information', key, default)
+        log.debug('get_information %s %s', key, default)
        path = self._sqlite_encode_path(path)
        value = self._storage.select("SELECT value FROM information WHERE key = ? AND "
                                     "session_id = ? AND path = ?",
@ -205,7 +205,7 @@ class Values(Sqlite3DB):
            return self._sqlite_decode(value[0])

    def del_information(self, path, key, raises):
-        log.debug('del_information', key, raises)
+        log.debug('del_information %s %s', key, raises)
        path = self._sqlite_encode_path(path)
        if raises and self._storage.select("SELECT value FROM information WHERE key = ? "
                                           "AND session_id = ? AND path = ?",
@ -282,7 +282,7 @@ class Values(Sqlite3DB):

    def get_max_length(self,
                       path):
-        log.debug('get_max_length', path)
+        log.debug('get_max_length %s', path)
        val_max = self._storage.select("SELECT max(idx) FROM value WHERE path = ? AND session_id = ?",
                                       (path, self._session_id), False)
        if val_max[0][0] is None:
--- a/tiramisu/storage/util.py
+++ b/tiramisu/storage/util.py
@ -75,16 +75,16 @@ class Cache(DictCache):
                         'expire' in self_props):
                    ntime = int(time())
                    if timestamp + expiration_time >= ntime:
-                        log.debug('getcache in cache (1)', path, value, _display_classname(self),
+                        log.debug('getcache in cache (1) %s %s %s %s %s', path, value, _display_classname(self),
                                  id(self), index)
                        return True, value
-                    else:
-                        log.debug('getcache expired value for path {} < {}'.format(
-                                  timestamp + expiration_time, ntime))
-                        # if expired, remove from cache
-                        #self.delcache(path)
+                    #else:
+                    #    log.debug('getcache expired value for path {} < {}'.format(
+                    #              timestamp + expiration_time, ntime))
+                    #    # if expired, remove from cache
+                    #    #self.delcache(path)
                else:
-                    log.debug('getcache in cache (2)', path, value, _display_classname(self),
+                    log.debug('getcache in cache (2) %s %s %s %s %s', path, value, _display_classname(self),
                              id(self), index)
                    return True, value
        log.debug('getcache {} with index {} not in {} cache'.format(path, index,
@ -94,13 +94,13 @@ class Cache(DictCache):
    def delcache(self, path):
        """remove cache for a specified path
        """
-        log.debug('delcache', path, _display_classname(self), id(self))
+        log.debug('delcache %s %s %s', path, _display_classname(self), id(self))
        if path in  self._cache:
            self._delcache(path)

    def reset_all_cache(self):
        "empty the cache"
-        log.debug('reset_all_cache', _display_classname(self), id(self))
+        log.debug('reset_all_cache %s %s', _display_classname(self), id(self))
        self._reset_all_cache()

    def get_cached(self):
--- a/tiramisu/value.py
+++ b/tiramisu/value.py
@ -16,10 +16,11 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # ____________________________________________________________
 import weakref
-from typing import Optional
+from typing import Optional, Any, Callable
 from .error import ConfigError, PropertiesOptionError
 from .setting import owners, undefined, forbidden_owners, OptionBag, ConfigBag
 from .autolib import carry_out_calculation
+from .function import Params
 from .i18n import _


@ -135,26 +136,48 @@ class Values(object):
        return self.getdefaultvalue(option_bag)

    def getdefaultvalue(self,
-                        option_bag,
-                        force_index: Optional[int]=None):
+                        option_bag):
        """get default value:
        - get meta config value or
        - get calculated value or
        - get default value
-        :param opt: the `option.Option()` object
-        :param path: path for `option.Option()` object
-        :type path: str
-        :param index: index of a multi/submulti
-        :type index: int
-        :returns: default value
        """
+        moption_bag = self._get_meta(option_bag)
+        if moption_bag:
+            # retrieved value from meta config
+            return moption_bag.config_bag.context.cfgimpl_get_values().get_cached_value(moption_bag)
+
+        if option_bag.option.impl_has_callback():
+            # default value is a calculated value
+            value = self.calculate_value(option_bag)
+            if value is not undefined:
+                return value
+
+        # now try to get default value:
+        value = option_bag.option.impl_getdefault()
+
+        # - if option is a submulti, return a list a list
+        # - if option is a multi, return a list
+        # - default value
+        if option_bag.option.impl_is_multi() and option_bag.index is not None:
+            # if index, must return good value for this index
+            if len(value) > option_bag.index:
+                value = value[option_bag.index]
+            else:
+                # no value for this index, retrieve default multi value
+                # default_multi is already a list for submulti
+                value = option_bag.option.impl_getdefault_multi()
+        return value
+
+    def calculate_value(self,
+                        option_bag: OptionBag) -> Any:
        def _reset_cache(_value):
            if not 'expire' in option_bag.properties:
                return
            is_cache, cache_value = self._p_.getcache(option_bag.path,
                                                      None,
-                                                      index,
-                                                      config_bag.properties,
+                                                      option_bag.index,
+                                                      option_bag.config_bag.properties,
                                                      option_bag.properties,
                                                      'value')
            if not is_cache or cache_value == _value:
@ -162,75 +185,55 @@ class Values(object):
                # so do not invalidate cache
                return
            # calculated value is a new value, so reset cache
-            config_bag.context.cfgimpl_reset_cache(option_bag)
+            option_bag.config_bag.context.cfgimpl_reset_cache(option_bag)

-        config_bag = option_bag.config_bag
-        opt = option_bag.option
-        if force_index is not None:
-            index = force_index
-        else:
-            index = option_bag.index
-        moption_bag = self._get_meta(option_bag)
-        if moption_bag:
-            # retrieved value from meta config
-            return moption_bag.config_bag.context.cfgimpl_get_values().get_cached_value(moption_bag)
-
-        if opt.impl_has_callback():
-            # if value has callback, calculate value
-            callback, callback_params = opt.impl_get_callback()
-            value = carry_out_calculation(opt,
-                                          callback=callback,
-                                          callback_params=callback_params,
-                                          index=index,
-                                          config_bag=config_bag,
-                                          fromconsistency=option_bag.fromconsistency)
-            if isinstance(value, list) and index is not None:
-                # if value is a list and index is set
-                if opt.impl_is_submulti() and (value == [] or not isinstance(value[0], list)):
-                    # return value only if it's a submulti and not a list of list
-                    _reset_cache(value)
-                    return value
-
-                if len(value) > index:
-                    # return the value for specified index if found
-                    _reset_cache(value[index])
-                    return value[index]
-                # there is no calculate value for this index,
-                # so return an other default value
-            else:
-                if opt.impl_is_submulti():
-                    if isinstance(value, list):
-                        # value is a list, but no index specified
-                        if (value != [] and not isinstance(value[0], list)):
-                            # if submulti, return a list of value
-                            value = [value]
-                    elif index is not None:
-                        # if submulti, return a list of value
-                        value = [value]
-                    else:
-                        # return a list of list for a submulti
-                        value = [[value]]
-                elif opt.impl_is_multi() and not isinstance(value, list) and index is None:
-                    # return a list for a multi
-                    value = [value]
+        # if value has callback, calculate value
+        callback, callback_params = option_bag.option.impl_get_callback()
+        value = self.carry_out_calculation(option_bag,
+                                           callback,
+                                           callback_params)
+        if isinstance(value, list) and option_bag.index is not None:
+            # if value is a list and index is set
+            if option_bag.option.impl_is_submulti() and (value == [] or not isinstance(value[0], list)):
+                # return value only if it's a submulti and not a list of list
                _reset_cache(value)
                return value
+            if len(value) > option_bag.index:
+                # return the value for specified index if found
+                _reset_cache(value[option_bag.index])
+                return value[option_bag.index]
+            # there is no calculate value for this index,
+            # so return an other default value
+        else:
+            if option_bag.option.impl_is_submulti():
+                if isinstance(value, list):
+                    # value is a list, but no index specified
+                    if (value != [] and not isinstance(value[0], list)):
+                        # if submulti, return a list of value
+                        value = [value]
+                elif option_bag.index is not None:
+                    # if submulti, return a list of value
+                    value = [value]
+                else:
+                    # return a list of list for a submulti
+                    value = [[value]]
+            elif option_bag.option.impl_is_multi() and not isinstance(value, list) and option_bag.index is None:
+                # return a list for a multi
+                value = [value]
+            _reset_cache(value)
+            return value
+        return undefined

-        # now try to get default value:
-        # - if opt is a submulti, return a list a list
-        # - if opt is a multi, return a list
-        # - default value
-        value = opt.impl_getdefault()
-        if opt.impl_is_multi() and index is not None:
-            # if index, must return good value for this index
-            if len(value) > index:
-                value = value[index]
-            else:
-                # no value for this index, retrieve default multi value
-                # default_multi is already a list for submulti
-                value = opt.impl_getdefault_multi()
-        return value
-
+    def carry_out_calculation(self,
+                              option_bag: OptionBag,
+                              callback: Callable,
+                              callback_params: Optional[Params]) -> Any:
+        return carry_out_calculation(option_bag.option,
+                                     callback=callback,
+                                     callback_params=callback_params,
+                                     index=option_bag.index,
+                                     config_bag=option_bag.config_bag,
+                                     fromconsistency=option_bag.fromconsistency)
    def isempty(self,
                opt,
                value,
Author	SHA1	Message	Date
Emmanuel Garette	0e02ae3182	changelog	2019-03-24 20:27:26 +01:00
Emmanuel Garette	ac42fd509c	remove documentation (now in a separate project)	2019-03-24 20:26:51 +01:00
Emmanuel Garette	4709ac5f01	corrections in debug logger	2019-03-23 08:26:39 +01:00
Emmanuel Garette	cab8dae15a	requirement can have callback	2019-03-13 08:49:18 +01:00