将
__iter__而不是类本身添加到元类中（假设Python 2.x）：
class Foo(object): bar = "bar" baz = 1 class __metaclass__(type): def __iter__(self): for attr in dir(self): if not attr.startswith("__"): yield attr对于Python 3.x，请使用
class metaFoo(type): def __iter__(self): for attr in dir(self): if not attr.startswith("__"): yield attrclass Foo(metaclass=metaFoo): bar = "bar" baz = 1
