PySide6 disables logging debug level

Strangelove

I can't understand why PySide6 seems to interfere with my logging configuration. Consider this:

import logging

logging.basicConfig(level=logging.DEBUG)
logging.debug('Hey')

This outputs:

DEBUG:root:Hey

But this:

import logging
import PySide6

logging.basicConfig(level=logging.DEBUG)
logging.debug('Hey')

Output nothing.

The order of imports doesn't matter. Also, importing a specific module from PySide6 doesn't seem to matter either (e.g. from PySide6.QtWidgets import QAbstractButton gives the same result).

If I use a custom logger, the debug level works but every message is displayed twice, but only if PySide6 is imported:

import logging
from PySide6.QtWidgets import QAbstractButton

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

ch = logging.StreamHandler()
ch.setFormatter(logging.Formatter('[ %(levelname)s ] %(name)s : %(message)s'))
logger.addHandler(ch)
logger.debug('Hey')

Results in:

[ DEBUG ] __main__ : Hey
DEBUG:__main__:Hey

Remove the PySide6 import, and I only get the first message.

Why is that happening?

Thanks.

SGaist

Hi,

Which version of PySide6 are you using ?
On which platform ?
Which which version of Python ?

Strangelove

@SGaist Pyside 6.1.2, macOS Catalina, Python 3.9.6.

Please have a look at my SO post for more details (in the comments). I can get around this behavior by manually removing the handler that the PySide6 import seems to add to my logger. But it feels like a hack.

eyllanesc

@Strangelove It seems like a bug introduced in PySide6 since it is not observed in PySide2 so I recommend you report it: https://bugreports.qt.io/projects/PYSIDE/issues, here we can do little or nothing. I also reproduce that behavior on Linux with PySide6 6.1.2 and python 3.9.6.

Strangelove

@eyllanesc said in PySide6 disables logging debug level:

I recommend you report it

Just did. Thanks a lot.