python subprocess with timeout

gistfile1.py

def call(command, timeout=60):
    process = None

    def target():
        global process
        process = subprocess.Popen(command)
        process.communicate()

    thread = threading.Thread(target=target)
    thread.start()

    thread.join(timeout)
    if thread.is_alive():
        process.terminate()
        thread.join()