python: iter、next函数

# -*- coding: utf-8 -*-

# 首先获得Iterator对象:
it = iter([1, 2, 'Hello', 'Nanjing', [10, 20]])
print type(it)
print it
# 循环:
while True:
    try:
        # 获得下一个值:
        x = next(it)
        print(x)
    except StopIteration:
        # 遇到StopIteration就退出循环
        break