Link: Talk description and video

I couldn't find the slides online but please do link me if you find them, they were a treasure trove of awesome tips and very well laid out!

The talk touched on many things, the following tips are unrelated to each other and in no particular order.

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Beware the corner cases of negative slicing -- if you use a variable for slicing there's likely a bug lurking in your code!

mytuple = 1, 2, 3 # Tuple declaration also works without parenthesis

Learn Python the way Guido intended it and indented it :P

for x in reversed(seq): # Better than negative slicing because it's clearer, there's no need to do a double take

for i, x in enumerate(seq): # That's Pythonic! Forget about i in range, seq[i]

for x, y in zip(seqx, seqy)

for/else: a for loop with an else, the else executes if there was no break in the loop, that is, when the loop runs to completion. It's only useful when there is a break (the searching use case).

None is always smaller than everything else, in comparisons.

Sets aren't guaranteed order after being sorted, because __lt__ has been overridden to indicate subsets and supersets.

If you intend to define __lt__ you must also implement the 6 ordering functions.

# Key function:
sorted(s, key=str.lower) # (awesome!)

If a class takes in an iterable, and emits iterables lots of awesome may occur, with the prebuilt tools and other surprising uses (kind of works like pipes and filters).

d = defaultdict(dict)
d[stuff][otherstuff] = "blah"
# as opposed to
d = dict()
d[stuff] = dict()
# etc...

d.update(dict(d))