Python script to test interrupt handling by signal.

test_signal.py

#! /usr/local/bin/python3.6
"""
Test interrupt handling by signal
"""
import datetime
import os
import signal
import sys
import time
import traceback


class TestSignal:
    def __init__(self):
        signal.signal(signal.SIGHUP,  self.__handler)
        signal.signal(signal.SIGINT,  self.__handler)
        signal.signal(signal.SIGQUIT, self.__handler)
        signal.signal(signal.SIGTERM, self.__handler)

    def exec(self):
        try:
            while(True):
                print(datetime.datetime.now())
                time.sleep(5)
        except Exception as e:
            raise

    def __handler(self, signum, frame):
        try:
            signames = {1: "HUP", 2: "INT", 3: "QUIT", 15: "TERM"}
            print("Detected {}:SIG{}!".format(signum, signames[signum]))
        except Exception as e:
            raise
        finally:
            sys.exit(0)


if __name__ == '__main__':
    try:
        print("PID =", os.getpid())
        obj = TestSignal()
        obj.exec()
    except Exception as e:
        traceback.print_exc()
        sys.exit(1)