log messages appearing twice with Python Logging

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I"m using Python logging, and for some reason, all of my messages are appearing twice.

I have a module to configure logging:

# BUG: It"s outputting logging messages twice - not sure why - it"s not the propagate setting.
def configure_logging(self, logging_file):
    self.logger = logging.getLogger("my_logger")
    self.logger.setLevel(logging.DEBUG)
    self.logger.propagate = 0
    # Format for our loglines
    formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
    # Setup console logging
    ch = logging.StreamHandler()
    ch.setLevel(logging.DEBUG)
    ch.setFormatter(formatter)
    self.logger.addHandler(ch)
    # Setup file logging as well
    fh = logging.FileHandler(LOG_FILENAME)
    fh.setLevel(logging.DEBUG)
    fh.setFormatter(formatter)
    self.logger.addHandler(fh)

Later on, I call this method to configure logging:

if __name__ == "__main__":
    tom = Boy()
    tom.configure_logging(LOG_FILENAME)
    tom.buy_ham()

And then within say, the buy_ham module, I"d call:

self.logger.info("Successfully able to write to %s" % path)

And for some reason, all the messages are appearing twice. I commented out one of the stream handlers, still the same thing. Bit of a weird one, not sure why this is happening...lol. Assuming I"ve missed something obvious.

Cheers, Victor

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We hope this article has helped you to resolve the problem. Apart from log messages appearing twice with Python Logging, check other __main__ Python module-related topics.

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Oliver Porretti

Shanghai | 2023-01-27

Simply put and clear. Thank you for sharing. log messages appearing twice with Python Logging and other issues with code Python module was always my weak point 😁. Checked yesterday, it works!

Anna Danburry

Prague | 2023-01-27

__main__ Python module is always a bit confusing 😭 log messages appearing twice with Python Logging is not the only problem I encountered. Will get back tomorrow with feedback

Anna Chamberlet

Abu Dhabi | 2023-01-27

Simply put and clear. Thank you for sharing. log messages appearing twice with Python Logging and other issues with re Python module was always my weak point 😁. Checked yesterday, it works!

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