#!/usr/bin/env python
#_*_coding:utf-8_*_
#name = raw_input("What is your name") #only on python 2.x
name = input("What is your name")
print("Hello " + name )

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import getpass
# 将用户输入的内容赋值给 name 变量
pwd = getpass.getpass("请输入密码：")
# 打印输入的内容
print(pwd)

name = "alex"
print "i am %s " % name 
# 输出: i am alex
# PS: 字符串是 %s;整数 %d;浮点数%f

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
os.system("df -h") #调用系统命令