constants heritage
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@ -20,48 +20,47 @@
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# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
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# the whole pypy projet is under MIT licence
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# ____________________________________________________________
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class _const:
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"""convenient class that emulates a module
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and builds constants (that is, unique group names)"""
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class GroupError(TypeError): pass
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and builds constants (that is, unique names)"""
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class ConstError(TypeError): pass
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def __setattr__(self, name, value):
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if self.__dict__.has_key(name):
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raise self.GroupError, "Can't rebind group (%s)"%name
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raise self.ConstError, "Can't rebind group (%s)"%name
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self.__dict__[name] = value
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def __delattr__(self, name):
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if self.__dict__.has_key(name):
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raise self.GroupError, "Can't unbind group (%s)"%name
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raise self.ConstError, "Can't unbind group (%s)"%name
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raise NameError, name
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groups = _const()
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def populate_groups():
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"populates the available groups in the appropriate namespaces"
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_available_group_names = ('default', 'family', 'group')
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_available_groups_with_a_master = ('group', )
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# ____________________________________________________________
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class GroupModule(_const):
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"emulates a module to manage unique group (OptionDescription) names"
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class GroupName(str):
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"""allowed normal group (OptionDescription) names
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*normal* means : groups that are not master
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"""
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pass
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class MasterGroupName(GroupName):
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"""allowed normal group (OptionDescription) names
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*master* means : groups that have the 'master' attribute set
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"""
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pass
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# setting.groups (emulates a module)
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groups = GroupModule()
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groups.GroupName = GroupName
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groups.MasterGroupName = MasterGroupName
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def populate_groups():
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"populates the available groups in the appropriate namespaces"
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_available_group_names = ('default', 'family', 'group')
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_available_groups_with_a_master = ('group', )
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# populates normal or master groups
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for grp in _available_group_names:
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if grp in _available_groups_with_a_master:
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setattr(groups, grp, MasterGroupName(grp))
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setattr(groups, grp, groups.MasterGroupName(grp))
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else:
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setattr(groups, grp, GroupName(grp))
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setattr(groups, grp, groups.GroupName(grp))
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# names are in the module now
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populate_groups()
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# ____________________________________________________________
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