text: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # @Time    : 2018/3/11 15:41
  # @Author  : Jackokie Zhao
  # @Site    : www.jackokie.com
  # @File    : file_4_5.py
  # @Software: PyCharm
  # @contact: jackokie@gmail.com