Thanks for the suggestion. If you want to get this added to core Python, there's a bit more you'll need to do here: first, you'd need to persuade the core developers that this functionality is needed. Some real-world motivating examples would help a lot with this. Second, if there's widespread acceptance of the idea, it would be useful to have an implementation that includes accompanying tests and documentation. (Especially documentation: it's not at all clear to me just looking at the code what exact problem it's solving.)

In this case, I'd suggest taking this to the python-ideas mailing list for further discussion (https://mail.python.org/mailman3/lists/python-ideas.python.org/).

You can also take a look at this part of the developer guide for more guidelines on adding new functionality to Python: https://devguide.python.org/stdlibchanges/