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']
current_users_lower = {user.lower() for user in current_users}
for new_user in new_users:
if new_user.lower() in current_users_lower:
print(f"The user name {new_user} has already been registered! Please change it and try again!")
else:
print(f"Congratulations, the user name {new_user} is available!")
