with open(‘zhanghaomima‘,‘r‘,encoding=‘utf8‘) as f_read:
    file_dict = eval(f_read.read().strip())
i=0
while i<3:
    user = input("username:")
    password = input("passwd:")
    if user in file_dict:
        if file_dict[user]==password:
            print("登入成功!")
            break
        else:
            print(‘登入失敗!‘)
            i+=1
    else:
        print("賬號不存在!請重新輸入")
    if i==3:
        print("輸錯三次了,賬號%s被鎖定"%user)
        print("退出程序")
        break

模擬登入簡單程序---2018.2.24