Test effective userid python subprocess

script.py

#! /bin/python

import subprocess
import os

print("subprocess.call")
print("Without seteuid")
subprocess.call(['id', '-u'])

print("With seteuid")
os.seteuid(int(os.getenv('USERID')))
subprocess.call(['id', '-u'])

print("Script bash")
subprocess.call(['./script.sh'])

script.sh

#! /bin/bash
echo `id -u`

subprocess.call(['sudo', '-u', 'user', 'id', '-u'])