迭代器
必须有 iter
必须有 next
- isinstance(对象, 类)
判断一个对象是不是这个类的实例,返回值是bool类型
class Names(object):
names = list()
def __init__(self):
self.names = list()
self.curent_num = 0
def add_name(self, name):
self.names.append(name)
def __iter__(self):
return self
def __next__(self):
if self.curent_num < len(self.names):
name = self.names[self.curent_num]
self.curent_num += 1
return name
else:
raise StopIteration
def main():
name = Names()
name.add_name("张三")
name.add_name("李四")
name.add_name("王五")
name.add_name("溜溜")
for i in name:
print(i)
if __name__ == '__main__':
main()