Fix Python – Python logging: use milliseconds in time format


Asked By – Jonathan Livni

By default logging.Formatter('%(asctime)s') prints with the following format:

2011-06-09 10:54:40,638

where 638 is the millisecond. I need to change the comma to a dot:

2011-06-09 10:54:40.638

To format the time I can use:


however the documentation doesn’t specify how to format milliseconds. I’ve found this SO question which talks about microseconds, but a) I would prefer milliseconds and b) the following doesn’t work on Python 2.6 (which I’m working on) due to the %f:


Now we will see solution for issue: Python logging: use milliseconds in time format


This should work too:


This question is answered By – Craig McDaniel

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