Python3: Highest and Lowest

Kata

In this little assignment you are given a string of space separated numbers, and have to return the highest and lowest number.

Example:

high_and_low("1 2 3 4 5") # return "5 1"
high_and_low("1 2 -3 4 5") # return "5 -3"
high_and_low("1 9 3 4 -5") # return "9 -5"

Notes:

All numbers are valid Int32, no need to validate them.
There will always be at least one number in the input string.
Output string must be two numbers separated by a single space, and highest number is first.

My solution

def high_and_low(numbers):
    arr = [int(i) for i in numbers.split(' ')]
    return " ".join([str(max(arr)), str(min(arr))])