Python - logging using formatter and getLogger

Question

I am trying to add a timestamp to my Python logging code.

I have the code:

logging.basicConfig(format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
                    datefmt='%m-%d %H:%M')
log = logging.getLogger('Test_Service')

log.info('    Hello World')

But the output only shows:

INFO:Test_Service:    Hello World

How can I get the formatter to work here so that I can include the timestamp?

Did you do anything with the logging module before the code you show here? — offbyone
– offbyone, Commented Feb 20, 2014 at 22:56

Vinay Sajip · Accepted Answer · 2014-02-20 23:26:38Z

1

Something else is calling basicConfig() first, and so your call has no effect.

You should ensure that:

There is only one call to basicConfig() from your code, and that's in a main() or called from the if __name__ == '__main__ clause before a call to a main().
There are no calls in your code to convenience logging module-level functions such as logging.debug() - such calls call basicConfig() automatically. Replace any such calls with logger.debug() where logger is any Logger instance (the root logger is allowed - just don't call the module-level convenience functions).
If it still doesn't work, you are using third party code which calls basicConfig() (library code should never do this) and you will need to investigate further.

answered Feb 20, 2014 at 23:26

Vinay Sajip

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1 Comment

atlas_scoffed Over a year ago

Python 3.8 has a new parameter: force=True to override any existing basicConfig settings. Useful for Lambda function logging.

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