text: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # ----------------------------------------------------------------------------------------------------------------------
  # file: mock
  # author: eva
  # date: 2018/1/8
  # version: 0.1.0
  # description: the functions in this file are to mock web request.
  # ----------------------------------------------------------------------------------------------------------------------
  import random
  
  
  def get_random_user_agent():
      pass
  