text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  
  # 筛选回数
  def is_palindrome(n):
      s = str(n)
      return s == s[::-1]
  
  
  # 测试:
  output = filter(is_palindrome, range(1, 1000))
  print('1~1000:', list(output))
  if list(filter(is_palindrome, range(1, 200))) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66,
                                                    77, 88, 99, 101, 111, 121, 131, 141, 151, 161,
                                                    171, 181, 191]:
      print('测试成功!')
  else:
      print('测试失败!')
  
  