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']
for i in new_users:
if i.lower() in [i.lower() for i in current_users]:
print('The user name %s has already been registered! Please change it and try again!'%i)
else:
new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi']
for i in new_users:
if i.lower() in [i.lower() for i in current_users]:
print('The user name %s has already been registered! Please change it and try again!'%i)
else:
print('Congratulations, the user name %s is available!'%i)
难点在于大小写，用列表生成器把原列表转化为小写列表，然后用小写的数据进行对应即可
