I come from the viewpoint that I don't want my build tool to install my Python for me.

In the same vein, I don't want Gradle or Maven to install my JVM for me.

In JVM land I use SDKMAN! (Yes, that's what the amazingly awesome (in the original sense of awe: "an emotion variously combining dread, veneration, and wonder") concretion of Bash scripts is called).

In Python land I use pyenv.

And I expect my build tool to respect the JVM/Python versions I've set (looking at you Poetry...) and fail if they can't find them (You know what you did, Poetry. But you're still so much better than Pipenv)