Learning Python Advanced Syntax like...

Compound infinite list comprehensions in Haskell make my head hurt.

I FINALLY comprehend list comprehensions.
I can write an unlimited amount of nested loops on a single line and make other less experienced people hate me for fun and profit.

Also learned about map() #I hate it#, zip(which is awesome), and the utility of lambdas (they're okay).

Enumerate is pretty nifty too, only thing I lose is setting the initial value of the iterator index.

I thought nested list comprehensions in haskell were hard.
Until I tried to make a non fixed footer that stays on the bottom.

Don't know If it count as a function, but my favorite thing in python are its comprehensions, there is hardly something more usefull