A timer class for logging process times.

time_logger.py

from time import time


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

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

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

    def log_time(self):
        assert self.start is not None and self.end is not None
        message = 'Consumed time for "{}": {}'.format(self.label,
                                                      self.end - self.start)
        if self.logger is None:
            print(message)
        else:
            self.logger.info(message)

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

    def stop_timer(self):
        self.end = time()
        self.log_time()