My real question would be, what does this do that Google's Stack Overflow hits don't do. One would hope that the answer is, "Give me advice on how to do it in Python 3.6 that didn't get downvoted to death because there's already a SO question on how to do it in Python 2.7." But the cynic in me knows that, in software, particularly software's social environment, the only effective way to clear out the old, obsolete, broken wheels so they're not always in the way is by re-inventing them.

I think that you're painting with a little too broad a brush, the inverse is true too, I've seen way too much blind application of GoF patterns by professional engineers.

I think the key word is understanding. what each idiom needs is a good rubric explaining why this is the/a correct approach, but that is much harder to provide