utils.py 文件源码

def __getattr__(self, name):
        if name != '__setstate__':
            # this avoids an infinite loop when pickle looks for the
            # __setstate__ attribute before the object is initialized
            with suppress(KeyError):
                return self._mapping[name]
        raise AttributeError("%r object has no attribute %r" %
                             (type(self).__name__, name))