["python","logging","time","python-logging"]
Python logging: use milliseconds in time format

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: logging.Formatter(fmt='%(asctime)s',datestr=date_format_str) 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: logging.Formatter(fmt='%(asctime)s',datefmt='%Y-%m-%d,%H:%M:%S.%f')
This should work too: logging.Formatter( fmt='%(asctime)s.%(msecs)03d', datefmt='%Y-%m-%d,%H:%M:%S' )