Python學習記錄-2016-11-28

標籤：password   welcome   correct   python   import   

所學模組：

import os

import sys

import getpass

os.system("df -h")

cmd_res = os.system("df -h")

print(cmd_res) 為0，因為結果為0，如果想看結果，請使用如下寫法:

cmd_res = os.popen("df -h").read()

os.mkdir("directory")建立目錄

print(sys.path)

查看python匯入模組的路徑

一般/usr/lib/python2.7/site-packages

可以import模組，import模組時，不加尾碼py

if else用法

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.")

最佳化：

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學習記錄-2016-11-28