The things is there's multiple computation models, and while they are equivalent, there's a fairly involved computation needed to move from one model to the next. Then you got a lot of patterns of abstractions and best practices (best known as paradigm) that are built on top of those models to get today's programming languages.

So something like python is a fairly specialized language. Most of its concepts are not that easy to translate to another language which may involved another set of specialized paradigms.

You will need to revert to a common base, which basically means unravel what gives Python its identity, then rebuild according to the other programming language identity. And there's a lot of human choices in there which will be the most difficult to replicate. The idiomatic way of programming is a subset of what is possible in the language just to enable faster reading between human developers.

So there's no language agnostic programming as there's no agnostic computation models. It's kinda how there's no agnostic hardware architecture. There's a lot of fairly involved work to have cross-platform programs. But that can work as the common platform is very low-level itself (JVM and other runtimes)