python信号signal简单示例

进程间通信之类的，用得着，

可以自定义接到信息之后的动作。

file1.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
import signal
from time import sleep

def onsignal_term(a, b):
    print("Get SIGTERM signal")

signal.signal(signal.SIGTERM, onsignal_term)

def onsignal_usr1(a, b):
    print("Get SIGUSR1 signal")

signal.signal(signal.SIGUSR1, onsignal_usr1)

while 1:
    print("My process id is: ", os.getpid())
    sleep(10)

file2.py

import os
import signal
from time import sleep
while 1:
    os.kill(25334, signal.SIGTERM)
    os.kill(25334, signal.SIGUSR1)
    sleep(3)