Question

I am trying to implement the python logging handler TimedRotatingFileHandler.

When it rolls over to midnight it appends the current day in the form YYYY-MM-DD.

LOGGING_MSG_FORMAT  = '%(name)-14s > [%(levelname)s] [%(asctime)s] : %(message)s' LOGGING_DATE_FORMAT = '%Y-%m-%d %H:%M:%S'  logging.basicConfig(             level=logging.DEBUG,             format=LOGGING_MSG_FORMAT,             datefmt=LOGGING_DATE_FORMAT             ) root_logger = logging.getLogger('') logger = logging.handlers.TimedRotatingFileHandler("C:\\logs\\Rotate_Test",'midnight',1) root_logger.addHandler(logger) while True:     daemon_logger = logging.getLogger('TEST')     daemon_logger.info("SDFKLDSKLFFJKLSDD")     time.sleep(60) 

The first log file created is named Rotate_Test, then once it rolls over to the next day it changes the file name to Rotate_Test.YYYY-MM-DD where YYYY-MM-DD is the current day.

How can I change how it alters the filename?

Answer 1

‘How can i change how it alters the filename?’

Since it isn’t documented, I elected to read the source. This is what I concluded from reading the source of logging/handlers.py

handler = logging.handlers.TimedRotatingFileHandler('C:\\isis_ops\\logs\\Rotate_Test','midnight',1) handler.suffix = '%Y-%m-%d' # or anything else that strftime will allow root_logger.addHandler(handler) 

The suffix is the formatting string.