model.py 文件源码

def __dir__(self):
        def get_attrs(obj):
            import types
            if not hasattr(obj, '__dict__'):
                return []
            if not isinstance(obj.__dict__, (dict, types.DictProxyType)):
                raise TypeError(
                    '{0}.__dict__ is not a dictionary'.format(obj.__name__))
            return obj.__dict__.keys()

        def dir2(obj):
            attrs = set()
            if not hasattr(obj, '__bases__'):
                # obj is an instance
                if not hasattr(obj, '__class__'):
                    # slots
                    return sorted(get_attrs(obj))
                klass = obj.__class__
                attrs.update(get_attrs(klass))
            else:
                # obj is a class
                klass = obj

            for cls in klass.__bases__:
                attrs.update(get_attrs(cls))
                attrs.update(dir2(cls))
            attrs.update(get_attrs(obj))
            return list(attrs)

        return dir2(self) + self.keys()

    # TODO: Ditch this behavior. (Backwards incompatible change!)
    # It's probably that at some point a user is going create a method named
    # the same as a key fetched from PIX.