import sys, threading, time

class D:
    def __del__(self):
        try:
            1/0
        except:
            self.a = 1

class WellBehavedClient:
    def run(self):
        while True:
            connection = D()
            sys.stderr.write('.')


def run():
    client = WellBehavedClient()
    thread = threading.Thread(target=client.run, args=())
    thread.setDaemon(True)
    thread.start()

    time.sleep(0.2)

run()