实现用户注册网站,编辑用户名时判断是否已经存在:
若存在则提示“The name you used have already existed,please change your name”
若不存在,则提示“register success!”,并将其加入用户列表。
最后打印出用户列表
PS:不区分大小写
usrs = ['root','administrator','admin','ming','hong','guo']
new_usr = input('Please input your name:')
if new_usr.lower() in usrs:
print('The name you used have already existed,please change your name.')
else:
usrs.append(new_usr.lower())
print('register success!')
print(usrs)