def __call__(self, index, graph):
for c in self.criteria:<EOL><INDENT>if c(index, graph):<EOL><INDENT>return True<EOL><DEDENT><DEDENT>return False<EOL>
Evaluates all the criteria and applies an OR opartion

           Arguments:
            | ``index``  --  the index of the vertex/edge on which the criterion
                             is applied
            | ``graph``  --  the graph on which the criterion is tested