How to sort a list of tuples by the nth element?

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I have a list of fashion tuples:

[(0, 1), (2, 3), (4, -5), (6, -3)]

I want to sort that list by the second value of each tuple (i.e., in case we would [(4, -5), (6, -3), (0, 1), (2, 3)]. How to do this?

python tuple classification

1 answer

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The simplest way is to use key in the call to method sort of the list:

data = [(0, 1), (2, 3), (4, -5), (6, -3)]
data.sort(key=lambda x: x[1])

>>> data
[(4, -5), (6, -3), (0, 1), (2, 3)]

Thus, the element 1 of each tuple will be the sorting key. Another option considered fastest is to use the function itemgetter library operator.

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