Is there a way in Python to get a list of all defined loggers?
I mean, does something exist such as logging.getAllLoggers() which would return a list of Logger objects?
I searched the python.logging documentation but couldn't find such a method.
-
similar: stackoverflow.com/q/31599940djvg– djvg2023-08-25 07:48:13 +00:00Commented Aug 25, 2023 at 7:48
-
1since python 3.12 there is logging.getLogger().getChildren()milahu– milahu2023-10-16 13:11:49 +00:00Commented Oct 16, 2023 at 13:11
Add a comment
|
3 Answers
Loggers are held in a hierarchy by a logging.Manager instance. You can interrogate the manager on the root logger for the loggers it knows about.
import logging
loggers = [logging.getLogger(name) for name in logging.root.manager.loggerDict]
Calling getLogger(name) ensures that any placeholder loggers held by loggerDict are fully initialized when they are added to the list.
6 Comments
mistiru
In fact, getting the dict of Logger per name is better than simply a list of Logger alone, so
logging.root.manager.loggerDict was exactly what I was searching for, thank you!
Dimitar Ivanov
A small note here is that root logger is not returned by this snippet.
Matt-Mac-Muffin
Anyone has an explanation about why PyCharm's linting warns about this snippet:
Unresolved attribute reference 'manager' for class 'RootLogger'? I know it can be easily disabled, but still...
Roland
pylint doesn't seem to found it. I get a no-member reported for loggerDict. |
If you want to include RootLogger in the list as well, do something similar to:
import logging
loggers = [logging.getLogger()] # get the root logger
loggers = loggers + [logging.getLogger(name) for name in logging.root.manager.loggerDict]
tested on Python 3.7.4
1 Comment
vvvvv
This was what solved it for me: the missing root logger was the source of all the problems I had.
If you are trying to examine the hierarchy of logging objects, I'd recommend using logging_tree.printout():
import logging_tree
logging_tree.printout()
Or, if you want to have the logging tree accessible to your code:
logging_tree.tree()
See https://pypi.org/project/logging_tree/ for more info.
1 Comment
mistiru
I would have preferred to do it without depending on a third party library, but thank you for the link :)