__getattr__和getattr之间是什么关系？

Alex的回答很好，但是自从您提出要求以来，它就为您提供了示例代码:)

class foo:    def __init__(self):        self.a = "a"    def __getattr__(self, attribute):        return "You asked for %s, but I'm giving you default" % attribute>>> bar = foo()>>> bar.a'a'>>> bar.b"You asked for b, but I'm giving you default">>> getattr(bar, "a")'a'>>> getattr(bar, "b")"You asked for b, but I'm giving you default"

简而言之，答案是

你用

__getattr__

和

getattr