Small change in MDANSE.Core.UserDefinitions class

18a3cd79 · eric pellegrini · 19de1651 · 18a3cd79
Commit 18a3cd79 authored Apr 02, 2015 by eric pellegrini
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MDANSE/Core/UserDefinitions.py MDANSE/Core/UserDefinitions.py +4 -0

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--- a/MDANSE/Core/UserDefinitions.py
+++ b/MDANSE/Core/UserDefinitions.py
@@ -184,6 +184,10 @@ class UserDefinitions(object):
        :type ud: MDANSE.Framework.UserDefinables.IUserDefinable derived object
        '''

+        from MDANSE.Framework.UserDefinables.IUserDefinable import IUserDefinable               
+        if not isinstance(ud,IUserDefinable):
+            raise UserDefinitionsError("Invalid user definition: must be a user definable object")
+
        targets = self.setdefault(unicode(target),{})
        
        categories = targets.setdefault(unicode(category),{})