new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  r"""
   #        .---.         .-----------
   #       /     \  __  /    ------
   #      / /     \(  )/    -----   (`-')  _ _(`-')              <-. (`-')_
   #     //////    '\/ `   ---      ( OO).-/( (OO ).->     .->      \( OO) )     .->
   #    //// / //  :   : ---      (,------. \    .'_ (`-')----. ,--./ ,--/  ,--.'  ,-.
   #   // /   /  / `\/ '--         |  .---' '`'-..__)( OO).-. ' |   \ |  | (`-')'.'  /
   #  //          //..\\          (|  '--.  |  |  ' |( _) | | | |  . '|  |)(OO \    /
   # ============UU====UU====      |  .--'  |  |  / : \|  |)| | |  |\    |  |  /   /)
   #             '//||\\`          |  `---. |  '-'  /  '  '-' ' |  | \   |  `-/   /`
   #               ''``            `------' `------'    `-----' `--'  `--'    `--'
   # ######################################################################################
   #
   # Author: edony - edonyzpc@gmail.com
   #
   # twitter : @edonyzpc
   #
   # Last modified: 2015-05-28 22:20
   #
   # Filename: extractor.py
   #
   # Description: All Rights Are Reserved
   #
   # ******
   # Extract the specific content from text with the given keys.
  """
  import os
  import re
  class Extractor(object):
      """
      Extract the specific content with keys.
      """
      def __init__(self, keys, extracted_file):
          self.keys = keys
          self.extracted_file
  
subject: add extractor.py