Python全栈开发第13天

#多用户登录                                                                                                                                      

import getpass         #引用getpass
import os              #引用os
import configparser    #引用配置文件操作的库

count = 0
count_other = 0
while True:
    if os.path.exists(‘./user.conf‘):                                #判断user.conf用户是否存在
        user_name = input("please input your username:")             #输入用户名
        user_pass = getpass.getpass("please input your password:")   #输入密码
        cp = configparser.ConfigParser()                             # 加载现有配置文件
        cp.read("./user.conf")
        li = cp.get(‘user‘, ‘user‘).split(‘,‘)                       #将用户名放入列表li中
        if user_name in li:                                          #判断用户是否在列表中
            password = cp.get( user_name , ‘password‘)
            status = int(cp.get( user_name , ‘status‘))
            if password == user_pass:
                if status == 3 :
                    print("Your username is locked!Please contact your administrator ")
                    break
                else:
                    print("Welcome to my system!!!")
                    break
            else:
                print("You input the username or password is wrong ,please try agin!!")
                status = int(status) + 1
                cp.set(user_name , ‘status‘,str(status) )
                with open(‘user.conf‘, ‘w‘) as fw:
                    cp.write(fw)
                if status == 3:
                    print("Your username is locked!Please contact your administrator ")
                    break

        else:
            print("You input the username or password is wrong ,please try agin!!")
            count_other = count_other + 1
            if count_other == 3 :
                break
            continue
    else:
        conf = configparser.ConfigParser()
        # 写入配置文件
        conf.add_section(‘user‘) #添加section
        # 添加值
        conf.set(‘user‘, ‘user‘, ‘jimmy,aaa,bbb‘)
        conf.add_section(‘jimmy‘)
        conf.set(‘jimmy‘, ‘password‘, ‘aaa‘)
        conf.set(‘jimmy‘, ‘status‘, ‘0‘)
        conf.add_section(‘aaa‘)
        conf.set(‘aaa‘, ‘password‘, ‘aaa‘)
        conf.set(‘aaa‘, ‘status‘, ‘0‘)
        conf.add_section(‘bbb‘)
        conf.set(‘bbb‘, ‘password‘, ‘bbb‘)
        conf.set(‘bbb‘, ‘status‘, ‘0‘)
        # 写入文件
        with open(‘./user.conf‘, ‘w‘) as fw:
            conf.write(fw)

Python是一门什么类型的语言：

编译型语言，把明文的代码执行前，先转成二进制，在执行，这个过程就叫编译；（c,c++,go）

特点：运行效率高；依赖编译平台，linux操作系统跟cpu的交互结构与Windows不是完全一样的（例如linux:print_to_console,windos:print_to_screen）；

缺点：不能跨平台，开发效率低