How to list all existing loggers using python.logging module
PythonPython 3.xLoggingPython Problem Overview
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.
Thank you in advance.
Python Solutions
Solution 1 - Python
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.
Solution 2 - Python
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
Solution 3 - Python
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.