objectif

Lancer un processus, vérifier le code retour et imposer un timeout.

code minimal

import subprocess, sys

cp = subprocess.run([sys.executable, "-c", "print(42)"], capture_output=True, text=True, check=True, timeout=5)
print(cp.stdout.strip())  # attendu: 42

utilisation

import subprocess, sys
r = subprocess.run([sys.executable, "-c", "import time; time.sleep(0.1); print('ok')"], capture_output=True, text=True, timeout=1)
print(r.returncode == 0 and r.stdout.strip() == "ok")

variante(s) utile(s)

import subprocess, sys
try:
    subprocess.run([sys.executable, "-c", "import time; time.sleep(2)"], timeout=0.1)
except subprocess.TimeoutExpired:
    print(True)  # timeout attrapé

notes

• check=True lève CalledProcessError si le retour != 0.
• Toujours capturer stdout/stderr si vous avez besoin des sorties.