#!/usr/bin/env python3
import subprocess
import time

my_process = subprocess.Popen('sleep 1', shell=True, stdout=subprocess.PIPE)

while True:
  try:
    my_process.communicate(timeout=0.00000001)
    break
  except subprocess.TimeoutExpired:
    print('TimeoutExpired for pid %d. Trying again after 1 second...' % my_process.pid, flush=True)
    time.sleep(1)