#locklist.txt模擬鎖定用戶列表 格式如下
#user1
#user2

#userlist.txt模板註冊用戶列表 格式如下
# user1:password1
# user2:password2

#初始化輸入次數
count = 0

while True:
    #獲取用戶輸入
    username = input("Input your username:")
    password = input("password:")
    
    #判斷輸入用戶是否在鎖定用戶列表
    lock_list = open("locklist.txt","r")
    
 
while True:
        lock_list_line = lock_list.readline().split(":")
        if username == lock_list_line[0].replace("\n",""):
            print("用戶被鎖")
            exit()
        elif lock_list_line[0] == "":
            break
    lock_list.close()

    #判斷用戶密碼是否正確
    user_list = open("userlist.txt
 
","r")
    while True:
        user_list_line=user_list.readline().split(":")
        if username == user_list_line[0] and password == user_list_line[1].replace("\n",""):
            print("Welcom " + username)
            exit()
        elif username == user_list_line[0]:
            count +=1
            #
 
同一用戶密碼錯誤三次將用戶寫入鎖定列表
            if count == 3:
                lock_list = open("locklist.txt","a")
                lock_list.write(username+"\n")
                lock_list.close()
                exit("用戶被鎖")
            print("密碼輸入錯誤！")
            break
        elif user_list_line[0] == "":
            print("用戶不存在！")
            break
    user_list.close()

Python3 模擬用戶密碼輸入三次錯誤後鎖定