Sorting on the last field of a line

Question

What is the simplest way to sort a list of lines, sorting on the last field of each line? Each line may have a variable number of fields.

Something like

Answer 1

Here is a python oneliner version, note that it assumes the field is integer, you can change that as needed.

echo file.txt | python3 -c 'import sys; list(map(sys.stdout.write, sorted(sys.stdin, key=lambda x: int(x.rsplit(" ", 1)[-1]))))'