How to sort list of tuples in python?

Question

Python

How to sort a list of tuples by the first element of the tuple?
For example, there is
list1 = [(13, 5, 7), (0, 23, 1), (7, 4, 3)]
It needs to become
list2 = [(0, 23, 1), (7, 4, 3) , (13, 5, 7)]

Answer 1

And now the correct one:

from operator import itemgetter

list2 = sorted(list1, key=itemgetter(0))

UPD.
As aRegius rightly noted , in this case it is not necessary to provide a comparator function at all, that is, it
will simply work.
My opinion: it's a bit non-obvious. But it works.