There are a few reasons you can’t have multiple versions of the same module at the same time. Consider a simple enum class defined in a package: two versions now have two different enum objects which may not compare equally. Maybe a function from module A would return Enum.A and pass it to module B, which would then compare A.Enum.A to B.Enum.A, which fails. Super confusing.

So yes, Python’s import system is dynamic enough to do crazy things, but I don’t see how we can ever retrofit that into Python.

Regarding dependencies installed into a project-local directory (node_modules): that’s a virtual environment. Just more flexible.