i = 3 username = 'zhourui' password = 123 while i>0: i -= 1 name = input('请输入用户名:') while name == username: word = int(input('请输入密码:')) if word == password: print('登陆成功') break else: print('密码错误,你还有'+str(i)+'次机会') if i == 0: print('机会用完,登陆失败') ask = input('再试试?Y') if ask == 'Y': i = 2 continue break i -= 1 continue break if name != username: print('用户名错误,你还有'+str(i)+'次机会') if i == 0: print('机会用完,登陆失败') ask = input('再试试?Y') if ask == 'Y': i = 2 continue break