04-09，Work-账户登录，三次拉黑

count = 0
flag = 1
lock = []
user_pass = []
username = input('Boy,你的名字:')
f = open('blacklist',mode='r')#读取黑名单的内容
lock_file = f.readlines()
f.close()
for i in lock_file:
    line = i.strip('
')
    lock.append(line)
if username in lock:
    print('Boy,你账户已经被锁定了！')#若输入的用户名在黑名单中，提示用户已经被锁定
else:
    while True:
        count += 1
        passwd = input("Boy,你的密码:")
        f = open('Users',mode='r')
        user_file = f.readlines()
        f.close()
        for i in user_file:
            user_pass = i.strip().split()
            if username == user_pass[0] and passwd == user_pass[1]:
                print('Welcome,Boy:' ,username)
                flag = True
                break
            else:
                continue
        if flag is True:
            break
        else:
            if count == 3:
                print('Boy,你已经输错三次密码了，拉黑！')
                lock_file = open('Blacklist',mode='a')
                lock_file.write(username)
                lock_file.close()
                break

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Users的账户：

alex 0714
egon 123123
gao 369521

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Blacklist的拉黑账户：

qwe