Python subprocess multi-line Python script

Python subprocess can run inline multi-line Python code. This is useful to use Python as a cross-platform demonstration or for production code where a new Python instance is called.

import subprocess
import sys

# the -u is to ensure unbuffered output so that program prints live
cmd = [sys.executable, "-u", "-c", r"""
import sys
import datetime
import time

for _ in range(5):