Constructing the largest number possible by rearranging a list

Question

Say I have an array of positive whole integers; I\'d like to manipulate the order so that the concatenation of the resultant array is the largest number possible. For exampl

Answer 1

import itertools
nums =  ["9", "97", "13"]
m = max(("".join(p) for p in itertools.permutations(nums)), key = int)

You can use itertools.permutations as hinted and use the key argument of the max function (which tells which function to apply to each element in order to decide the maximum) after you concat them with the join function.

It's easier to work with strings to begin with.