关键点在于用户名不区分大小写,于是把旧表的数据upper()或者lower(),然后新表的元素遍历时用同样形式与之比较 current_users = ['Niuniu', 'Niumei', 'GURR', 'LOLO']new_users = ['GurR', 'Niu Ke Le', 'LoLo', 'Tuo Rui Chi']a = [i.upper() for i in current_users] for i in new_users: if i....