Python logger as a context manager

example.py

import logging
from logger import log_level

def message(self, message):
    with log_level(logging.INFO, __name__) as logger:
        input_args = [EXECUTABLE_NAME, SEND_COMMAND]
        try:
            process = subprocess.Popen(input_args,
                                       stdout=subprocess.PIPE,
                                       stdin=subprocess.PIPE,
                                       stderr=subprocess.STDOUT)
            sleep(3)

            process.stdin.write(bytes(message + '\n', 'utf-8'))
            process.stdin.flush()
        except subprocess.CalledProcessError as e:
            logger.error("Error while sending")
            logger.debug(e)

logger.py

import logging
from contextlib import contextmanager

LOG_FILENAME = "app.log"


@contextmanager
def log_level(level, name, handler=None):
    logging.basicConfig()
    logger = logging.getLogger(name)

    if logger.hasHandlers():  # remove all previous handlers. Without this -> duplicated logs and without format
        logger.handlers.clear()

    if handler is not None:
        logger.addHandler(handler)
    else:
        logger.addHandler(logging.FileHandler(LOG_FILENAME))

    formatter = logging.Formatter(fmt='%(asctime)s: %(message)s', datefmt='%I:%M:%S')
    logger.handlers[0].setFormatter(formatter)
    old_level = logger.getEffectiveLevel()
    logger.setLevel(level)
    logger.propagate = True

    try:
        yield logger
    finally:
logger.setLevel(old_level)