Your task is to make a function that can take any non-negative integer as a argument and return it with its digits in descending order. Essentially, rearrange the digits to create the highest possible number.
Examples
Input: 21445
Output: 54421
Input: 145263
Output: 654321
Input: 123456789
Output: 987654321
def descending_order(num):
pass
def descending_order(num):
return int("".join(sorted([num for num in str(num)], reverse=True)))