CODEWITHSUNDEEP
pythonlogging
Jad S
Jad S

Reputation: 2995

Using TimedRotatingFileHandler, how to name the first log file by the same convention as the rotations?

I'm using the logging module python 3.4 to log performance over many days. I wanted to have it rotate so that everyday it creates and writes to a new log file with the date in the name. The logging module's TimedRotatingFileHandler handler does that well enough. However, say I put in a log filename 'FN.log' and I get:

FN.log
FN.log.2016.05.03
FN.log.2016.05.04
FN.log.2016.05.05

etc..

Is there a way to have the first file also include the date? I've also considered maybe immediately triggering a rotation on startup which should do the trick but I don't know how to do that yet. Thanks!

PS: Ideally, if I happen to kill the app and restart it on the same day, it would continue writing in the same log file as the pre-existing one from that day (the one created by the rotation, for instance). However that last bit is optional: if it's too hard, I can always create a new log directory everytime I run the program.

Upvotes: 3

Views: 1938

Answers (1)

Vinay Sajip
Vinay Sajip

Reputation: 99307

It's not the first file - it's the current file being logged to. When rollover happens, the file FN.log gets renamed with a name containing a date, and a brand new FN.log file is opened and used for subsequent logs until the next rollover.

Upvotes: 11

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