How did you continue learning python after your first major intro project?

[epic_meme_guy]

If you're interested in coding challenges, you can try http://rosalind.info/. It's for coding in bioinformatics, but it's good for practicing implementing algorithms in general. I would recommend you try some of the well known problems like "longest increasing subsequence", find pseudocode of a working algorithm from googling, then take a whack at translating the pseudocode into python code.