Different Python versions

I'm a CRAN package developer and I have had many people call for a Python implementation of one of my packages. I got a student to create this and we have it all working in base Python but I wanted to take advantage of the same C code that the R package uses.

This is when I ran into Python problems. I've tried several recommended ways of interfacing existing C code to Python but for each way there are Python installs that cannot download and use my package! You have to be using the "right" version of Python in order to be able to use the package. This is just my understanding so please do correct me if i'm wrong on this.

This, to me, is a huge downside of Python right now. Why should a user have to change their software to run my package? I can see an argument for forcing users to upgrade, but most Python packages that run on 2.7 don't run on 2.6 or 3.0. At least with R packages get checked and removed if authors don't update them.

El issue no menciona archivos, pruebas ni puntos de entrada. Empieza por aclarar la interfaz Python/C solicitada y las versiones de Python compatibles; darlo por terminado requeriría un objetivo de compatibilidad acordado y pruebas de que el paquete se instala en él.