【3.12】contextlib简化上下文管理器

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


@contextlib.contextmanager
def file_open(file_name):
    print('file_open')
    yield
    print('file end')


with file_open('zy.txt') as f_opened:
    print('file processing')

file_open
file processing
file end