Python for循环内部实现的一个sample详解编程语言

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
it = iter([1,2,3,4,5]) 
while True: 
    try: 
        x = next(it) 
        print(x) 
    except StopIteration as e: 
        print('catch StopIteration') 
        break