[lexlambda]

And project specifying "requires python 3.X+" instead of Version X to Y is also a major culprit I often encounter.

Most of the times it will not work with the newest shiny python, which I only notice after already installing it and then having searched search the Github issues.

[__MatrixMan__]

That happens to me all the time. It helped cement my habit of binding the python version to the project with direnv and a flake.nix so I end up switching to the right version when I cd to the project dir.