How To Sort A Tuple Based On A Value Within The List Of Tuples

In python, I wish to sort tuples based on the value of their last element. For example, i have a tuple like the one below. tuples = [(2,3),(5,7),(4,3,1),(6,3,5),(6,2),(8,9)] which

Solution 1:

Povide list.sort with an appropriate key function that returns the last element of a tuple:

tuples.sort(key=lambda x: x[-1])

Solution 2:

You can use:

from operator import itemgetter

tuples = sorted(tuples, key=itemgetter(-1))

The point is that we use key as a function to map the elements on an orderable value we wish to sort on. With itemgetter(-1) we construct a function, that for a value x, will return x[-1], so the last element.

This produces:

>>>sorted(tuples, key=itemgetter(-1))
[(4, 3, 1), (6, 2), (2, 3), (6, 3, 5), (5, 7), (8, 9)]