Terminate subprocess in python doesn't work

Question

I want to terminate a subprocess, but it doesn't work. Here's my code:

import os
import subprocess

p = subprocess.Popen(['gnome-terminal','-e','tshark -i eth0 -w /root/Desktop/test.pcap'])
q = subprocess.Popen(['python','avtp2.py'])

if q.wait() == 0:
  p.terminate()

Do you know why?

Greetz

Answer 1

This works:

import os
import subprocess
from subprocess import check_output
import signal

p = subprocess.Popen(['gnome-terminal','-e','tshark -i eth0 -w /root/Desktop/test.pcap'],shell=False)
q = subprocess.Popen(['python','avtp2.py'])

if q.wait() == 0:
  p_pid = check_output(["pidof","tshark"]).split()
  os.kill(int(p_pid[0]), signal.SIGINT)