context.py

import logging
from contextlib import ContextDecorator

format = '%(asctime)s - %(levelname)s - %(message)s'
ch = logging.StreamHandler()
ch.setFormatter(logging.Formatter(format))
logger = logging.getLogger()
logger.setLevel(logging.DEBUG)
logger.addHandler(ch)


class context_decorator(ContextDecorator):

    def __enter__(self):
        return self

    def __exit__(self, *exc):
        if exc != (None, None, None):
            logging.info("***********************start")
            logging.exception("Uncaught exception: %s", exc[1])
            logging.info("***********************end")
        return False


with context_decorator():
    1 / 0