#------------__str__输出对象class Person:    def __init__(self,name):        self.name=name    def __str__(self):        return ('Person object name :%s'%self.name)print(Person('张三'))#-------------遍历对象class Student:    def __init__(self):        self.name='Python'        self.count=0    def __iter__(self):        return self    def __next__(self):        self.count+=1        if self.count>100:            raise StopIteration()        return self.countS=Student()for i in S:    print(i)#-------------------------定义__getitem__方法使用索引获取值class Language(object):    def __getitem__(self, item):        return itemlanguage = Language()print(language[2])#-------------------------------没有找到属性调用 _getattr__class Person:    def __init__(self,name):        self.name=name    def __getattr__(self, item):        if item=='addr':            return  '上海'        else:            return  '不知道'P=Person('张三')print(P.name)print(P.addr) #打印print(P.sb)#打印  不知道#-------------对象可执行__call__class Person:    def __init__(self,name):        self.name=name    def __call__(self, *args, **kwargs):        print ('My name is %s'%self.name)P=Person('李四')P()