<s>[INST] Sort a list by multiple attributes? I have a list of lists:
[[12, 'tall', 'blue', 1],
[2, 'short', 'red', 9],
[4, 'tall', 'blue', 13]]

If I wanted to sort by one element, say the tall/short element, I could do it via s = sorted(s, key = itemgetter(1)).
If I wanted to sort by both tall/short and colour, I could do the sort twice, once for each element, but is there a quicker way?
 [/INST] A key can be a function that returns a tuple:
s = sorted(s, key = lambda x: (x[1], x[2]))

Or you can achieve the same using itemgetter:
import operator
s = sorted(s, key = operator.itemgetter(1, 2))

And notice that here you can use sort instead of using sorted and then reassigning:
s.sort(key = operator.itemgetter(1, 2))

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