graph_visitor.py 文件源码

def visitSetComp(self, node):

        defined, required = self.handle_generators(node.generators)
        required.update(get_symbols(node.elt, _ast.Load) - defined)

        for symbol in required:
            if not self.graph.has_node(symbol):
                self.graph.add_node(symbol)
                self.undefined.add(symbol)

        return required