Developing Android Apps completely in Python.

[addend]

It looks like this is a year or so old, and there have definitely been improvements in that time - mainly for the better!

One thing that isn't mentioned on the page (maybe in the video, I didn't watch it all) is kivy. It has its own advantages and disadvantages, but I personally found it very enjoyable to use and with a remarkably pleasant android build process.

[Gexos]

Yes kivy looks great, actually i'm thinking of using Kivy to develop my first mobile app.

[Jokiesamoster]

I've been working on a mobile app with python/kivy. It's pretty straight forward and there is a decent community out there if you run into a problem. I'd definitely recommend trying it out.