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代码
#/usr/bin/python # -*- coding: utf-8 -*- lock = open("black_user_list.txt", 'a', encoding='utf-8') lock.write(" ") user_list = open("userlist.txt", 'w+', encoding='utf-8') user_list.write("zhangsan ") user_list.write("lisi ") user_list.close() user_list = open("userlist.txt", 'r', encoding='utf-8') white_username = user_list.read().strip() user_list.close() lock = open("black_user_list.txt", 'r+', encoding='utf-8') lock_username = lock.read().strip() while True: username = input("username:") if username in lock_username: print("