option names shall be valid names

tiramisu/option.py

@@ -41,9 +41,13 @@ for act1, act2 in requires_actions:
 name_regexp = re.compile(r'^\d+')
 
 def valid_name(name):
-    return re.match(name_regexp, name)
-
+    if re.match(name_regexp, name) is None:
+        return True
+    else:
+        return False
+#____________________________________________________________
 #
+
 class Option(HiddenBaseType, DisabledBaseType):
     """
     Abstract base class for configuration option's.
@@ -74,7 +78,8 @@ class Option(HiddenBaseType, DisabledBaseType):
                           validation of the value
         :param validator_args: the validator's parameters
         """
-
+        if not valid_name(name):
+            raise NameError("invalid name: {0} for option".format(name))
         self._name = name
         self.doc = doc
         self._requires = requires
@@ -374,6 +379,8 @@ class OptionDescription(HiddenBaseType, DisabledBaseType):
         :param children: is a list of option descriptions (including
         ``OptionDescription`` instances for nested namespaces).
         """
+        if not valid_name(name):
+            raise NameError("invalid name: {0} for option descr".format(name))
         self._name = name
         self.doc = doc
         self._children = children