Timer

utils.py

from time import time


class Timer(object):
    def __init__(self, logger=None):
        self.start = None
        self.end = None
        self.logger = logger

    def __enter__(self):
        self.start = time()

    def __exit__(self, exc_type, exc_val, exc_tb):
        self.end = time()
        self.log()

    def log(self):
        assert self.start is not None and self.end is not None

        message = f'Total time: {self.end - self.start}s'
        if self.logger is None:
            print(message)
        else:
            self.logger.info(message)

import logging

logger = logging.getLogger('bisim')
with Timer(logger):
    for i in range(1_000_000):
        pass