Sort a list by multiple attributes?

Question

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 e

Answer 1

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 (which is faster and avoids a Python function call):

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))