Python lists have a built-in sort() method that modifies the list in-place and a sorted() built-in function that builds a new sorted list from an iterable.
>>> lst = [123,17,4,69,9,259,99]
>>> sorted(lst)
[4, 9, 17, 69, 99, 123, 259]
>>> lst
[123, 17, 4, 69, 9, 259, 99]
>>> lst.sort()
>>> lst
[4, 9, 17, 69, 99, 123, 259]
>>>