Python Basics Learning Notes

Character encoding

#!/usr/bin/env python

#-*-Coding:utf-8-*-

Comments:

Single-line Comment: # Comment Content

Multi-line Comment: ' comment content '

Save and output the user input information

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)

Formatted output:

#!/usr/bin/env python#-*-coding:utf-8-*-# author:hudengzhiname = input ("Your Name:") age = Int (input ("Your Age:")) job = Input ("Your job:") msg = ' Infomation of user%sname:%sage:%djob:%s '% (name, name, age, Job) print (msg)

Primary knowledge of common modules

#1. Ciphertext input

Import Getpass

Username = input ("")

Password = getpass.getpass ("Password:")

Print (Username,password)

#2. OS module use

Import OS

Os.system ("DF")

Os.mkdir ("Yourdir")

Os.system ("LS")

Cmd_res = Os.popen ("Df-h"). Read ()

Print (Cmd_res)

#3. Module Storage Path

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 statement

#!/usr/bin/env python
#-*-Coding:utf-8-*-
# Author:hudengzhi
user ="Hudengzhi"
passwd ="123456"
username =input("Username:")
Password =input("Password:")
ifUsername = = User:
Print("username is correct ...")
ifPassword = = passwd:
Print("Welcome login ...")
Else:
Print("Password is invalid ...")
Else:
Print("Even the user name is not written right, get out!" ")

#5 for Loop

Age = 22for I in range: guess_num = Int (input (' Age: ')) if guess_num = = Age:print ("Congratulations, you got it") bre AK #不再往后走, jump out of the entire loopelif guess_num > Age:print ("Think smaller") else:print ("Think big")

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Python Basics Learning Notes