Python file boilerplate

main.py

LOG_FILENAME = "mylog.log"
LOG_ENCODING = "utf-8"


def main():
    print("Hello world!")


if __name__ == "__main__":
    import datetime
    import logging
    import sys

    root_logger = logging.getLogger()
    root_logger.setLevel(logging.INFO)
    handler = logging.FileHandler(LOG_FILENAME, encoding=LOG_ENCODING)
    root_logger.addHandler(handler)
    # show log messages on terminal as well
    root_logger.addHandler(logging.StreamHandler(sys.stdout))

    start_d = datetime.datetime.now()
    logging.info(f"{__name__} program start @ {start_d}"[:-3])

    main()

    end_d = datetime.datetime.now()
    elapsed_d = end_d - start_d
    logging.info(
        f"{__name__} program end @ {end_d}"[:-3] + f"; took total {elapsed_d}"
    )

This boilerplate does:

• Create mylog.log file if necessary
• Log time right before main function
• Run main()
• Log time right after main function