create a logger to stdout. This creates logger for a series
    of module we would like to log information on.

def _create_stdout_logger(logging_level):
    """
    create a logger to stdout. This creates logger for a series
    of module we would like to log information on.
    """
    out_hdlr = logging.StreamHandler(sys.stdout)
    out_hdlr.setFormatter(logging.Formatter(
        '[%(asctime)s] %(message)s', "%H:%M:%S"
    ))
    out_hdlr.setLevel(logging_level)
    for name in LOGGING_NAMES:
        log = logging.getLogger(name)
        log.addHandler(out_hdlr)
        log.setLevel(logging_level)