multiple option call (fixes #1)

test/test_option.py

@@ -98,6 +98,16 @@ def test_option_isoptiondescription():
     assert not cfg.option('od.test').option.isoptiondescription()
 
 
+def test_option_double():
+    i = IntOption('test', '')
+    od = OptionDescription('od1', '', [i])
+    od = OptionDescription('od2', '', [od])
+    od = OptionDescription('od3', '', [od])
+    cfg = Config(od)
+    assert cfg.option('od2.od1.test').value.get() is None
+    assert cfg.option('od2').option('od1').option('test').value.get() is None
+
+
 def test_option_multi():
     IntOption('test', '', multi=True)
     IntOption('test', '', multi=True, default_multi=1)

tiramisu/api.py

@@ -203,6 +203,20 @@ class _TiramisuOptionOptionDescription(CommonTiramisuOption):
                                                settings.get_context_properties(),
                                                settings.get_context_properties())
 
+    def __call__(self,
+                 path: str,
+                 index: Optional[int]=None) -> 'TiramisuOption':
+        """Select an option by path"""
+        subpath = self._option_bag.option.impl_getname() + '.' + path
+        subconfig, name = self._subconfig.cfgimpl_get_home_by_path(subpath,
+                                                                   self._option_bag.config_bag)
+        path = self._option_bag.path + '.' + path
+        return TiramisuOption(name,
+                              path,
+                              index,
+                              subconfig,
+                              self._option_bag.config_bag)
+
 
 class _TiramisuOptionOption(_TiramisuOptionOptionDescription):
     """Manage option"""
@@ -738,17 +752,9 @@ class TiramisuOption(CommonTiramisuOption):
                                subconfig=subconfig,
                                config_bag=config_bag)
 
+
 #__________________________________________________________________________________________________
 #
-# First part of API:
-# - contexts informations:
-#   - context owner
-#   - context information
-#   - context property
-#   - context permissive
-# - forcepermissive
-# - unrestraint
-# - manage MetaConfig or GroupConfig
 
 
 class TiramisuContext(TiramisuHelp):