Python script to ensure successful execution of a randomly-failing process

run_stubborn_process.py

from subprocess import run
import logging
import sys


if __name__ == "__main__":
    cmd_line = sys.argv[1:]
    return_code = -1
    while return_code!=0:
        logging.warn('Executing command line "{}"'.format(' '.join(cmd_line)))
        p = run(cmd_line)
        return_code = p.returncode
        if return_code:
            logging.error('Execution failed with return code {}.'.format(hex(return_code)))
    logging.warn('Successful execution')

segfault.py

# Script that fails with a segmentation fault with a pre-defined crash probability
import ctypes

def crash():
    '''\
    crash the Python interpreter...
    '''
    b = 'a'.encode('utf-8')
    i = ctypes.c_char(b)
    j = ctypes.pointer(i)
    c = 0
    while True:
        j[c] = b
        c += 1
    j

##

from time import sleep
from random import random

CRASH_PROBABILITY = 0.8
sleep(1)
if random() < CRASH_PROBABILITY:
    crash()