python5-10 检查用户名

 1 检查用户名5-10
 2 current_users = ['Tom', 'bob', 'Alice', 'zhangsan', 'Lisi', 'John']
 3 new_users = ['zhangsan', 'tom', 'shabi', 'mahua', 'john']
 4 for new_user in new_users:
 5     cnt = 0
 6     for cur_user in current_users:
 7         if new_user.lower() != cur_user.lower():
 8             cnt = cnt + 1
 9     if cnt != len(current_users):
10         print("The name " + new_user + " has been used, please enter another name you like")
11     else:
12         print("The name " + new_user + " has not been used.")

1 guests = ['luo', 'ao', 'zeng', 'ye', 'xie', 'admin']
2 for guest in guests:
3     print(guest)
4     del guests[0]
5 print(guests)