def visit_BoolOp ( self , node ) : return sum ( ( self . visit ( value ) for value in node . values ) , [ ] )
lamba function that returns boolean python
Return type may come from any boolop operand .
def visit_BoolOp(self, node):
        """ Return type may come from any boolop operand. """
        return sum((self.visit(value) for value in node.values), [])