字符编码
#!/usr/bin/env python
# -*- coding:utf-8 -*-
注释：
单行注释： # 注释内容
多行注释： ''' 注释内容 '''
用户输入信息的保存并输出
3.X
user_input = input("your name:")
print("user name:",user_input)
2.X
user_input = raw_input("your name:")
print("user name:",user_input)
格式化输出：
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author: Hudengzhi
name = input("your name:")
age = int(input("your age:") )
job = input("your job:")
msg = '''Infomation of user %s
name : %s
age : %d
job : %s
'''% (name, name, age, job)
print(msg)常用模块初识
#1.密文输入
import getpass
username = input("")
password = getpass.getpass("password:")
print(username,password)
#2. os模块使用
import os
os.system("df")
os.mkdir("yourdir")
os.system("ls")
cmd_res = os.popen("df -h").read()
print(cmd_res)
#3.模块存放路径
import sys
print("sys.path")
/usr/lib/python2.7/dist-packages ##自己写的模块一般放在此目录
#4. if 语句
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author: Hudengzhi
user = "Hudengzhi"
passwd = "123456"
username = input("username:")
password = input("password:")
if username == user:
print("username is correct...")
if password == passwd:
print("Welcome login ...")
else:
print("password is invalid...")
else:
print("连用户名都没写对，滚出！")
#5 for 循环
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author: Hudengzhi
age = 22
for i in range(10):
guess_num = int(input("age:") )
if guess_num == age:
print("Congratulations , you got it")
break #不再往后走，跳出整个loop
elif guess_num > age:
print("Think smaller")
else:
print("Think big")
