cfg.py 文件源码

def assign_tuple_target(self, node, right_hand_side_variables):
        new_assignment_nodes = list()
        for i, target in enumerate(node.targets[0].elts):
            value = node.value.elts[i]

            label = LabelVisitor()
            label.visit(target)

            if isinstance(value, ast.Call):
                new_ast_node = ast.Assign(target, value)
                new_ast_node.lineno = node.lineno

                new_assignment_nodes.append( self.assignment_call_node(label.result, new_ast_node))

            else:
                label.result += ' = '
                label.visit(value)

                new_assignment_nodes.append(self.append_node(AssignmentNode(label.result, self.extract_left_hand_side(target), ast.Assign(target, value), right_hand_side_variables, line_number = node.lineno, path=self.filenames[-1])))


        self.connect_nodes(new_assignment_nodes)
        return ControlFlowNode(new_assignment_nodes[0], [new_assignment_nodes[-1]], []) # return the last added node