logger.py

import os
import logging

def create_logger(log_directory, filename, stream=False):
    info_filehandler = logging.FileHandler(os.path.join(log_directory, '{}_info.log'.format(filename)))
    debug_filehandler = logging.FileHandler(os.path.join(log_directory, '{}_debug.log'.format(filename)))

    formatter = logging.Formatter('%(asctime)s %(name)s %(levelname)s %(message)s')
    info_filehandler.setFormatter(formatter)
    debug_filehandler.setFormatter(formatter)

    info_filehandler.setLevel(logging.INFO)
    debug_filehandler.setLevel(logging.DEBUG)

    logger = logging.getLogger()
    for hdlr in logger.handlers[:]:
        logger.removeHandler(hdlr)

    if stream:
        streamhandler = logging.StreamHandler(sys.stdout)
        streamhandler.setFormatter(formatter)
        streamhandler.setLevel(logging.DEBUG)
        logger.addHandler(streamhandler)

    logger.addHandler(info_filehandler)
    logger.addHandler(debug_filehandler)

    logger.setLevel(logging.DEBUG)

    logging.getLogger('PIL.PngImagePlugin').setLevel(logging.ERROR)

    return logger