Python logging FileHandler outputting blank file

Question

I'm trying to change all my overused prints, to logging.* mainly because i wanted to have a logfile.

logger = logging.getLogger(__name__) formatter = logging.Formatter("{levelname}:{name}:{message}", style="{") file_handler = logging.FileHandler("log.txt") file_handler.setFormatter(formatter) file_handler.setLevel(logging.DEBUG) logger.addHandler(file_handler) console_handler = logging.StreamHandler() console_handler.setLevel(logging.INFO) console_handler.setFormatter(formatter) logger.addHandler(console_handler) logger.setLevel(logging.DEBUG)

Thats the code i have for now, and it's printing to the console correctly but not outputting anything at all to the file. The file even gets created randomly, but but when it does, it's always empty.

I'm using logger.debug() and logger.info(), not the logging.* ones.

Update:

Just copying that same code to an empty script, and importing works as expected. Weird.

Update 2:

I found a question that has the same problem as me, he says he found a solution, but he doesn't share it :(

Update 3:

This is my source. The code gets called by uTorrent everytime the status of a torrent changes. This is the command i have setup in uTorrent:

py C:\Users\Gcq\Downloads\Torrent\torrent.py -n %N -d %D -f %F -p %P -c %S -s %M

py because i have shebang at the top of my script that tells py to use python3. I have python2.7 installed too.
And the the commandline otions are the info that uTorrent exposes.

@IonutHulub Python 3.3.2 [MSC v.1600 32 bit (Intel)] on win32 — gcq
– gcq, Commented Dec 1, 2013 at 1:32
@MaximeLorant i think its okay, as i said, the file randomly gets created, so write permission should be ok. — gcq
– gcq, Commented Dec 1, 2013 at 16:46

Vinay Sajip · Accepted Answer · 2013-12-02 11:49:47Z

1

I'm not able to reproduce the problem (I have Python 3.3.0 installed rather than 3.3.2, but that shouldn't be relevant. See this screenshot:

enter image description here

The behaviour seems as expected, so I would look more closely at your Python installation/configuration, or any other part of your actual code which you haven't shown above.

answered Dec 2, 2013 at 11:49

Vinay Sajip

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3 Comments

gcq Over a year ago

does the file log.txt get created?

Vinay Sajip Over a year ago

Yes - if you look at the screenshot, you'll see where I do type log.txt and that its contents are printed and are as expected.

gcq Over a year ago

oh yeah, i didn't watch carefully.

gcq · Accepted Answer · 2013-12-02 20:09:26Z

I thought 'okay, i didn't told python where to put my output file' and indeed, it was on uTorrent base folder.

With all the expected output, so everything is working perfect now.

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