Is there an open source library for testing CloudwatchLog Filters?

Goal: Test CloudwatchLog Filters offline programatically. Ideally, would like to write a simple program to test many filters on many messages programatically. Something callable like : aws.cloudwatchLogsTester.isMatch(msg, filter)

Problem: Doesn't seem to be a resource available (e.g. npm package, py wheel, etc) that I can leverage to test filters on any given message. Ideally, don't want to re-implement what the documentation (https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/FilterAndPatternSyntax.html) says should happen.