【3.11】Python中的with语句

#!/user/bin/env python
# -*- coding:utf-8 -*-

# 上下文管理器协议


class Sample:
    def __enter__(self):
        print('enter')
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        print('exit')

    @staticmethod
    def do_something():
        print('do_something')


with Sample() as sample:
    sample.do_something()

enter
do_something
exit