Python logging example

logging-sample.py

import logging
import argparse

logger = logging.getLogger(__name__)

def main():
    logger.debug("debug message not visible except if you use --debug")
    logger.critical("critical message, always visible")


if __name__ == '__main__':
    parser = argparse.ArgumentParser(
        "my super script",
        # This will default value in usage
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser.add_argument("--debug", help="Enable debug", default=False, action='store_true')
    parser.add_argument("--debug-requests", help="Debug HTTPs requests", default=False, action='store_true')

    logging.basicConfig()
  
    args = parser.parse_args()
    if args.debug:
        logging.getLogger(__name__).setLevel(logging.DEBUG)
   
    if args.debug_requests:
        import http.client as http_client
        http_client.HTTPConnection.debuglevel = 1
        requests_logger = logging.getLogger('requests')
        requests_logger.setLevel(logging.DEBUG)
        requests_logger.propagate = True

    main()