Code for Creating a Logger When Making Python Command Line Tools

Here is a memo on the code for creating a logger when making a simple daemon application in Python.

import logging

_logger = logging.getLogger('my-application-name')


def _my_procedure(...):
    ...
    _logger.debug(...)
    ...
    


def setup_logger():
    _logger.setLevel(logging.DEBUG)
    _handler = logging.StreamHandler()
    _handler.setFormatter(logging.Formatter(
        '%(asctime)s %(thread)d %(name)s %(levelname)s %(message)s'
    ))
    # When formatting heavily
    # _handler.setFormatter(logging.Formatter(
    #     '%(name)s (%(process)d,%(thread)d) '
    #     '%(levelname)s %(asctime)s '
    #     '[%(module)s.%(funcName)s:%(lineno)d] '
    #     ' %(message)s'
    # ))
    _logger.addHandler(_handler)


if __name__ == '__main__':
    setup_logger()
    ...

This code sets up a basic logger for a Python application. The logger is configured to output messages to the console with a specific format and can be further customized if needed.