Beautiful chart, I want to make some interactive charts and d3.js is just suited for me. But I can't dive into JavaScript though it looks like easy. I'm familiar with Python. Anyone can suggest enough JavaScript tutorials to hack d3.js. Thanks!
I would get yourself a copy of The Good Parts. As someone who also went from Python to JS, it didn't fully click until I sat down and read through the book. Now there are aspects of JS I actually prefer over Python.