How to kill multiprocess parent program?

[daiguadaidai]

I run program but can't kill parent proccess.

code:

#-*- coding:utf-8 -*-
from concurrent import futures
import os
import sys
import signal
 
def test(num):
 import time
 
 print os.getpid()
 time.sleep(100)
 return time.ctime(), num

def handle_interrupt(signum, frame):
 print 'CAUGHT SIGINT!!!!!!!!!!!!!!!!!!!'
 sys.exit(1)

def main():

 signal.signal(signal.SIGTERM, handle_interrupt) # kill
 signal.signal(signal.SIGINT, handle_interrupt) # Ctrl+C
 signal.signal(signal.SIGQUIT, handle_interrupt) # Ctrl+\

 with futures.ProcessPoolExecutor(max_workers=3) as executor:
 print 'id:', id(executor)
 future1 = executor.submit(test,1)
 future2 = executor.submit(test,2)
 print future1
 print future1

 print future1.result()
 print future2.result()


if __name__ == '__main__':
 main()

run and press Ctrl + C can exit program:

python mul_future.py 
id: 140637338392144
<Future at 0x7fe8a35b8ad0 state=running>
<Future at 0x7fe8a35b8ad0 state=running>
2082
2083
^C
CAUGHT SIGINT!!!!!!!!!!!!!!!!!!!
CAUGHT SIGINT!!!!!!!!!!!!!!!!!!!
CAUGHT SIGINT!!!!!!!!!!!!!!!!!!!
CAUGHT SIGINT!!!!!!!!!!!!!!!!!!!

But use kill can't exit program

**session1:**run program:

python mul_future.py 
id: 140243206338128
<Future at 0x7f8cdf41aad0 state=running>
<Future at 0x7f8cdf41aad0 state=running>
2091
2092

**session2:**kill parent proccess:

ps -ef | grep python
root 2087 1910 0 21:32 pts/0 00:00:00 python mul_future.py
root 2091 2087 0 21:32 pts/0 00:00:00 python mul_future.py
root 2092 2087 0 21:32 pts/0 00:00:00 python mul_future.py
root 2093 2087 0 21:32 pts/0 00:00:00 python mul_future.py

kill 2087

ps -ef | grep python
root 2087 1910 0 21:32 pts/0 00:00:00 python mul_future.py
root 2091 2087 0 21:32 pts/0 00:00:00 python mul_future.py
root 2092 2087 0 21:32 pts/0 00:00:00 python mul_future.py
root 2093 2087 0 21:32 pts/0 00:00:00 python mul_future.py

what should i do?