Python：使类可迭代

Python：使类可迭代

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