模块

import os

cmd_res1 = os.system("dir")
print(cmd_res1)
# 执行命令 不保存结果

cmd_res2 = os.popen("dir").read()
print("---->\n\n",cmd_res2)
os.mkdir("new_dir")

import sys

print(sys.path)
print(sys.argv)
# C:\\Users\\python\\AppData\\Local\\Programs\\Python\\Python36-32\\lib 系统库存放
# C:\\Users\\python\\AppData\\Local\\Programs\\Python\\Python36-32\\lib\\site-packages 第三方库存放

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import getpass
# 自建登录脚本可被别人调用，在同目录下先，不然就在环境变量下，如site-packages

_username = "kim"
_password = "abc123"

username = input("username:")
password = getpass.getpass("password:")

if _username == username and _password ==password :
    print("Welcome")
else:
    print("fuck off")