Sorry, maybe I was unclear. I haven't really started learning python yet. I read it, and could probably write it. I don't know the ins and outs of the language. I don't even think I've written anything more than "hello world" in python, although, I'm pretty sure that program was also valid Ruby -- so it might not even count.

What I was trying to say is that the portability of python3 is bad enough that it effects non-python programmers.

For example, sometimes I want to try a new vim plugin that's written in python. I install it, and it doesn't work. Great. Then I find out it's because OS X's python can't interpret it. So I install python3 (which has a different executable name, also annoying). All good, right? Wrong. Vim needs to be compiled with python3 support because the python extension is exclusive to python. Now I have to recompile macvim with

    brew install macvim --with-python3 && brew install python3

It's not a quick process at all. Especially when I'm just trying something out. This stuff happens with other tools I've wanted to use too.

It doesn't ruin my whole day or anything, but it's a bit irritating to have to manage several versions of an interpreter for a language I'm not even using that language in production. It doesn't help that I use several machines and VMs.

So yeah, I know exactly what is annoying about it.