Reddit mentions of Game Programming with Python, Lua, and Ruby (Game Development)

This is a big question, and there is no answer. Battle Network is "coded" as most games are, on a custom built platform usually C or C++ based. If you want to make one, you can use literally any programming language. Which ones would be best? That depends on what you're looking for. If you want it to be easy to code, Python with PyGame is easy, or use an engine like GameMaker Studio or Unity. If you want a robust engine that runs efficiently on limited hardware resources, you can't beat C++ for that.

But programming is programming. In the end, what platform you use to write your code stops mattering once it's compiled. It all becomes object code in the end. You could write it in Java, C, Python, Haskell, Ruby, Cobol, [Whitespace](http://en.wikipedia.org/wiki/Whitespace_(programming_language), or Lolcode and the end result would be the same.

Game programming is difficult, and it's something people (like me!) spend years of their life and hundreds of thousands of dollars in student loan debt trying to learn. If you want to become a hobbyist programmer, I would definitely recommend finding a textbook and going through it to learn how to make a small game before attempting something big. Being good at computers is one thing, but game programming is a different beast altogether.

If you want to go the PyGame route, I recommend Game Programming in Python, Lua, and Ruby. It's a pretty solid book to get started with.