python3-cookbook/cookbook/c12/p01_start_stop_thread.py

import socket
import time

def countdown(n):
    while n > 0:
        print('T-minus', n)
        n -= 1
        time.sleep(5)

# Create and launch a thread
from threading import Thread
t = Thread(target=countdown, args=(10,))
t.start()


print('Still running' if t.is_alive() else 'Completed')


t.join()


t = Thread(target=countdown, args=(10,), daemon=True)
t.start()


class CountdownTask:
    def __init__(self):
        self._running = True

    def terminate(self):
        self._running = False

    def run(self, n):
        while self._running and n > 0:
            print('T-minus', n)
            n -= 1
            time.sleep(5)


c = CountdownTask()
t = Thread(target=c.run, args=(10,))
t.start()
c.terminate() # Signal termination
t.join() # Wait for actual termination (if needed)



class IOTask:
    def terminate(self):
        # sock is a socket
        sock.settimeout(5)   # set timeout period
        while self._running:
            # Perform a blocking I/O operation w/ timeout
            try:
                data = sock.recv(8192)
                break
            except socket.timeout:
                continue
            # Continued processing
        # Terminated
        return


from threading import Thread
class CountdownThread(Thread):
    def __init__(self, n):
        super().__init__()
        self.n = n

    def run(self):
        while self.n > 0:
            print('T-minus', self.n)
            self.n -= 1
            time.sleep(5)

c = CountdownThread(5)
c.start()


import multiprocessing
c = CountdownTask(5)
p = multiprocessing.Process(target=c.run)
p.start()