@smallgoogle
845 是 pid 啊
os.killpg(os.getpgid(p.pid), signal.SIGKILL)
=========================
os.killpg(pgid, sig)
Send the signal sig to the process group pgid.
--------------------------------
os.kill(pid, sig)
Send signal sig to the process pid. Constants for the specific signals available on the host platform are defined in the signal module.

https://docs.python.org/3.6/library/signal.html
你需要一个 singal handler，

import singal

类似于

def int_singnal_handler(signum, frame):
pass # do something to end your processes

# blah blah blah

signal.signal(signal.SIGINT, int_signal_handler)