#！/usr/bin/env python
#coding:utf-8
‘‘‘
    2017年8月19日
　　python 模擬用戶登錄，連續失敗次數超過3次永輝名被鎖定
    userfile 文件保存字典 用戶名，和密碼
    sorryname 文件保存字典 登錄過的的用戶名，登錄成功，值為0，登錄失敗，值+1
    當值大於等於3是，賬號被鎖定，無法進行登錄
‘‘‘
import shelve
# 私有屬性，保存文件名
__userfile = ‘loginname.dat‘
__users = ‘users‘
__sorryname = ‘sorrylogin.dat‘
__sorry = ‘sorryuser‘
#登錄功能
def login(name,passwd):
    userfile = shelve.open(__userfile)
    users = userfile[__users]
    sorryname = shelve.open(__sorryname)
    sorry = sorryname[__sorry]
    try:
        if name in users:
            #登錄成功
            if passwd == users[name]:
                sorry[name]=0
                return ‘登錄成功‘
            else:   # 失敗
                if name in sorry:
                    sorry[name]=sorry[name]+1
                else:
                    sorry[name]=1
                return ‘密碼錯誤‘
        else:
            return ‘沒有此用戶，請註冊‘
    finally:
        sorryname[__sorry]=sorry
        sorryname.close()
if __name__ == "__main__":　　　　
    #userfile = shelve.open(‘loginname.dat‘)
    #users = {‘fuzhentao‘:‘123456‘,‘zhangsan‘:‘456789‘,‘lisi‘:‘147852‘}
    #userfile[__users]=users
    #userfile.close()
    ‘‘‘sorryname = shelve.open(__sorryname)
    sorryuser={}
    sorryname[__sorry]=sorryuser
    sorryname.close()‘‘‘
    while True:
        sorryname = shelve.open(__sorryname)
        sorry = sorryname[__sorry]
        name = input(‘請輸入用戶名：‘)
        passwd = input(‘請輸入密碼：‘)
        if name in sorry and sorry[name]>=3:
            print("賬號被鎖定")
        else:
            print(login(name,passwd))

python 初學習 模擬用戶登錄