#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Jul 12 21:23:35 2019
help
@author: lywen
"""


#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Jul 12 21:23:35 2019
help
@author: lywen
"""


#!/usr/bin/env python3 # -*- coding: utf-8 -*- Created on Fri Jul 12 21:23:35 2019 help @author: lywen