def copy_value(self, orig_name, new_name):
        """Copy a variable"""
        ns = self._get_reference_namespace(orig_name)
        ns[new_name] = ns[orig_name]
def copy_value ( self , orig_name , new_name ) : ns = self . _get_reference_namespace ( orig_name ) ns [ new_name ] = ns [ orig_name ]
Copy a variable