I was annoyed by the number of RTFMs they call WTFs. They even claim some WTFs where Python behaves exactly as a naive user would expect, e.g. if I put 5 and 5.0 in a dict they are treated as the same key.

I saw two valid ones: "Lossy zip of iterators" is because Python conflates iterables and iterators, "The disappearing variable from outer scope" where deleting the exception is contrary to how scope works everywhere else.

They also miss the classic newbie head-scratcher:

    x = []
    for i in range(10):
        x.append(lambda: i)
    x[0]()