tailbiter2_py35.py 文件源码

def visit_ListComp(self, t):
        t = self.generic_visit(t)
        add_element = ast.Attribute(ast.Name('.elements', load), 'append', load)
        body = ast.Expr(Call(add_element, [t.elt]))
        for loop in reversed(t.generators):
            for test in reversed(loop.ifs):
                body = ast.If(test, [body], [])
            body = ast.For(loop.target, loop.iter, [body], [])
        fn = [body,
              ast.Return(ast.Name('.elements', load))]
        args = ast.arguments([ast.arg('.elements', None)], None, [], None, [], [])
        result = Call(Function('<listcomp>', args, fn),
                      [ast.List([], load)])
        return ast.copy_location(result, t)