Python Learning record-2016-11-28

The modules learned:

Import OS

Import Sys

Import Getpass

Os.system ("Df-h")

Cmd_res = Os.system ("Df-h")

Print (Cmd_res) is 0 because the result is 0, if you want to see the result, use the following notation:

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

Os.mkdir ("directory") Create a directory

Print (Sys.path)

View the path to the Python import module

General/usr/lib/python2.7/site-packages

Can import module, import module, without suffix py

If Else usage

user = Jack

passwd = 123456

Username = input ("Username:")

Password = input ("Password:")

If user = = Username:

Print ("username is correct.")

if passwd = = password:

Print ("Welcome log in.")

Else

Print ("Password is invailid.")

Optimization:

user = Jack

passwd = 123456

Username = input ("Username:")

Password = input ("Password:")

If user = = Username and passwd = = password:

Print ("Welcome login.")

Else

Print ("Username or password is invailid.")

Guess Age:

Age = 22

guess_num = Int (input ("Guess your Number"))

If Guess_num = Age:

Print ("Configratulations,you got It")

Elif Guess_num > Age:

Print ("Thins smaller")

Else

Print ("Think bigger")

Python Learning record-2016-11-28