I think you overestimate the difficulty. The Python programmers can probably step through R source code and figure out what's going on without too much trouble

I think you overestimate the difficulty. The Python programmers can probably step through R source code and figure out what's going on without too much trouble. The other statisticians probably already know and use R. The non-programmer, non-statistician, business types probably aren't interested in your source code--be it Python or R--and will want you to make pretty graphs and give presentations anyways.