有人问如何遍历取得类的子类或实例，取得类实例,# coding:utf

有人问如何遍历取得类的子类或实例，取得类实例,# coding:utf

# coding:utf-8"""有人问如何遍历取得类的子类或实例黄哥python远程视频培训班https://github.com/pythonpeixun/article/blob/master/index.md黄哥python培训试看视频播放地址https://github.com/pythonpeixun/article/blob/master/python_shiping.md咨询qq:1465376564"""import weakrefclass Foo(object):    """取得类的所有实例方法。"""    instances = []    def __init__(self, name=None):        self.__class__.instances.append(weakref.proxy(self))        self.name = namedef get_all_subclasses(cls):        """取得类的子类，子类的子类通过递归取得"""        all_subclasses = []        for subclass in cls.__subclasses__():            all_subclasses.append(subclass)            tmp = get_all_subclasses(subclass)            all_subclasses.extend(tmp)        return all_subclassesclass Foo2(Foo):    passclass Foo3(Foo):    passclass Foo4(Foo2):    passp1 = Foo('p1')p2 = Foo('p2')p3 = Foo('p3')p4 = Foo('p4')for instance in Foo.instances:    print(instance.name)print get_all_subclasses(Foo)