Python Learning Note 1

Guess the age to play

##!/usr/bin/python3#-*- coding:utf-8 -*-age = 24counter = 0for i in  range:     print ('-->counter: ', counter)     if counter  < 3:      num = int (Input ("QINGSHURU&NBSP;:"))        if num == age:          print ("huanying")          break       elif num > age:         print ("Tai  da ")       else:         print ("Tai xiao")     else:      continue_num= input ("Ni  xiang jixu ma:  ")       if continue_num ==  ' Y ':          counter = 0          Continue      else:         print (" Bye ")          break    counter =  Counter + 1

Login

#!/usr/bin/python3#-*-coding:utf-8-*-import getpassfor i in range (3): if I < 3:user = input ("Please enter user name:") passwor D = Getpass.getpass ("Please enter password:") if user = = "Chenhao" and Password = = "Chen": Print ("Welcome") Break Else:print ( "User name or password error") Else:print ("Too many inputs")

String formatted output

1234	name ="alex"print"i am %s "% name #输出: i am alex

PS: string is%s; integer%d; floating-point number%f

String Common functions:

• Remove whitespace

• Segmentation

• Length

• Index

• Slice

#!/usr/bin/env python# -*- coding: utf-8 -*- importsysprint(sys.argv)#输出$ python test.py helo world[‘test.py‘, ‘helo‘, ‘world‘]  #把执行脚本时传递的参数获取到了

　　

Os

123456

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

A complete combination.

123	importos,sysos.system(‘‘.join(sys.argv[1:])) #把用户的输入的参数当作一条命令交给os.system来执行

This article is from "Hao son of ▁ Yun's finger licking" blog, please be sure to keep this source http://chenhao6.blog.51cto.com/6228054/1863837

Python Learning Note 1