不区分大小写__提示用户名注册

current_users = ['Eric','Tony','mike','John','Amy']
now_users = ['Tony','JOHN','Jack','Mike','ada']
for now_user in now_users:
        if now_user in current_users:
                print("register again")
        else:
                print("OK!")       
萌新知道这样是不对的
怎样修改可以做到“不区分大小写（若now_users里出现John，current_users中有JOHN，注册不会成功）”输出呢？
求大神给解答！

current_users = ['Eric','Tony','mike','John','Amy']
now_users = ['Tony','JOHN','Jack','Mike','ada']
for now_user in now_users:
        if now_user.lower() in [ c.lower() for c in current_users]:
                print("register again")
        else:
                print("OK!")

字符串可以用lower（）忽略大小写

wycyl 发表于 2018-7-23 20:42
current_users = ['Eric','Tony','mike','John','Amy']
now_users = ['Tony','JOHN','Jack','Mike','ada']
...

好的，了解了，谢谢大神解答！