simple-logging

README.md

Simple python logging

This gist demonstrates how to setup logging and write to both standard-error and a file.

Output is printed to stderr as well as a file. For example:

$ python logger.py 
2020-02-19 11:46:59,473: WARNING: __main__: Starting to do stuff...
2020-02-19 11:47:01,480: INFO: __main__: Stuff done!
$ cat my-log.log 
2020-02-19 11:45:34,918 - __main__ - WARNING - Starting to do stuff...
2020-02-19 11:45:36,920 - __main__ - INFO - Stuff done!

logger.py

import logging
import time


def main():
    # get the logger based on the filename; this tells you where the log is coming form
    logger = logging.getLogger(__name__)
    logger.warning("Starting to do stuff...")
    time.sleep(2)
    logger.info("Stuff done!")


if __name__ == "__main__":
    # you setup configuration at the main entrypoint to the code
    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s: %(levelname)s: %(name)s: %(message)s",
        handlers=[logging.FileHandler("my-log.log"), logging.StreamHandler()],
    )
    main()