Setup Python logging

setup-python-logging.py

# Created this after googling for:
# - python logging replace handler
# - python logging basicconfig not working
# - python logging getlogger
def get_logger(level='DEBUG'):
    loghandler = logging.StreamHandler()
    logfmt = logging.Formatter(fmt='%(asctime)s:%(name)s:%(levelname)s:%(message)s',
                               datefmt='%Y-%m-%d %H:%M:%S')
    logger = logging.getLogger()    # get root logger, not __name__
    loghandler.setFormatter(logfmt)
    logger.handlers = [loghandler]
    logger.setLevel(os.environ.get('LOG_LEVEL', level))
    return logger