How to clear/reset all configured logging handlers in Python?

Question

My Situation
There may be one or more configured loggers, but I don't know what their names are.

Requirement
For testing purposes, I need to reconfigure logging handlers that were previously configured to log to stdout with a different format and logging level.

1. [caveat] I already know how to clear one handler.
2. [caveat] I would prefer stdlib over 3rd-party libs (pypi, github, et al).

Answer 1

print (logging.Logger.manager.loggerDict.keys())

found by digging the sources of logging package