def configure_logging(self):
        root_logger = logging.getLogger('')

        # Set up logging to a file
        root_logger.setLevel(logging.DEBUG)

        # Send higher-level messages to the console via stderr
        console = logging.StreamHandler(self.stderr)
        console_level = {self.WARNING_LEVEL: logging.WARNING,
                         self.INFO_LEVEL: logging.INFO,
                         self.DEBUG_LEVEL: logging.DEBUG,
                         }.get(self.options.verbose_level, logging.DEBUG)
        # The default log level is INFO, in this situation, set the
        # log level of the console to WARNING, to avoid displaying
        # useless messages. This equals using "--quiet"
        if console_level == logging.INFO:
            console.setLevel(logging.WARNING)
        else:
            console.setLevel(console_level)
        if logging.DEBUG == console_level:
            formatter = logging.Formatter(self.DEBUG_MESSAGE_FORMAT)
        else:
            formatter = logging.Formatter(self.CONSOLE_MESSAGE_FORMAT)
        logging.getLogger('iso8601.iso8601').setLevel(logging.WARNING)
        logging.getLogger('urllib3.connectionpool').setLevel(logging.WARNING)
        console.setFormatter(formatter)
        root_logger.addHandler(console)
        return
Create logging handlers for any log output.
dataset/ETHPy150Open openstack/python-neutronclient/neutronclient/shell.py/NeutronShell.configure_logging