for循环

for var in ....

    statement

    statement

else:

   statement

例子：注意range(5)是5次循环,range(0,5)是5次循环,range(1,5)是4次循环,

for i in range(5):  

    print (i)

else:

    print ("the for loop")

结果:

0

1

2

3

4

the for loop

例子：使用time模块，休息一秒

#!/usr/bin/python

# -*- coding: UTF-8 -*-

 

import time

 

myD = {1: 'a', 2: 'b'}

for key, value in dict.items(myD):

    print key, value

    time.sleep(1) # 暂停 1 秒