Python3 实现用户登陆，输入三次密码

不加注释版

#/usr/bin/python3
import readline
user = "seven"
passwd = "123"
username = input("please the enter user:")
for i in range(3):
    password = input("please the enter password:")
    if password.isdigit():
        password = int(password)
        if username == user and password == passwd:
            print("logon successfull")
            break
        else:
            print("logon failed")
    else:
        print("logon failed")

加注释版

#/usr/bin/python3
import readline#导入readline模块，否则无法移动光标和删除
user = "seven"
passwd = "123"#定义账号密码
username = input("please the enter user:")#提示用户输入账号信息  
    for i in range(3):#如果登陆失败允许重复输入三次
    password = input("please the enter password")#提示用户输入密码
    if password.isdigit():#判断输入的是否是数字 是则进行下一步 否则返回失败
        password = int(password)#赋值定义密码等于输入密码
        if username == user and password == passwd:#判断账号和密码是否一致
            print("logon successfull")#True
            break
        else:
            print("logon failed")#False
    else:
        print("logon failed")#不是数字则返回False

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