题解 | 禁止重复注册
禁止重复注册
https://www.nowcoder.com/practice/43acd439112c4b85a9168ad3dd7e2bd1
current_users = ['Niuniu', 'Niumei', 'GURR', 'LOLO']
new_users = ['GurR', 'Niu Ke Le', 'LoLo', 'Tuo Rui Chi']
upper_current_users = [x.upper() for x in current_users]
for user in new_users:
if user.upper() in upper_current_users:
print(f"The user name {user} has already been registered! Please change it and try again!")
else:
print(f"Congratulations, the user name {user} is available!")
