adds information attribute to an option

tiramisu/option.py

@@ -87,6 +87,7 @@ class Option(BaseType):
             raise NameError("invalid name: {0} for option".format(name))
         self._name = name
         self.doc = doc
+        self.informations = {}
         self._requires = requires
         self._mandatory = mandatory
         self.multi = multi
@@ -194,6 +195,25 @@ class Option(BaseType):
         "accesses the Option's doc"
         return self.doc
 
+    def set_information(self, key, value):
+        """updates the information's attribute
+        (wich is a dictionnary)
+
+        :param key: information's key (ex: "help", "doc"
+        :param value: information's value (ex: "the help string")
+        """
+        self.informations[key] = value
+
+    def get_information(self, key):
+        """retrieves one information's item
+
+        :param key: the item string (ex: "help")
+        """
+        if key in self.informations:
+            return self.informations[key]
+        else:
+            raise ValueError("Information's item not found: {0}".format(key))
+
     def getcallback(self):
         "a callback is only a link, the name of an external hook"
         return self.callback