threading event

import threading import time def func_1(): while True: print(f"[{threading.current_thread().name}] Printing this message every 2 seconds") time.sleep(2) # initiate the thread with daemon set to True daemon_thread = threading.Thread(target=func_1, name="daemon-thread", daemon=True) # or # daemon_thread.daemon = True # or # daemon_thread.setDaemon(True) daemon_thread.start() # sleep for 10 seconds and end the main thread time.sleep(4) # the main thread ends

import threading import time def thread_function(name): print(f"Thread {name}: starting") time.sleep(2) print(f"Thread {name}: finishing") my_thread = threading.Thread(target=thread_function, args=(1,)) my_thread.start() time.sleep(1) my_second_thread = threading.Thread(target=thread_function, args=(2,)) my_second_thread.start() my_second_thread.join() # Wait until thread finishes to exit

threading_event

import logging
import threading
import time


def wait_for_event(e):
    """Wait for the event to be set before doing anything"""
    logging.debug('wait_for_event starting')
    event_is_set = e.wait()
    logging.debug('event set: %s', event_is_set)


def wait_for_event_timeout(e, t):
    """Wait t seconds and then timeout"""
    while not e.is_set():
        logging.debug('wait_for_event_timeout starting')
        event_is_set = e.wait(t)
        logging.debug('event set: %s', event_is_set)
        if event_is_set:
            logging.debug('processing event')
        else:
            logging.debug('doing other work')


logging.basicConfig(
    level=logging.DEBUG,
    format='(%(threadName)-10s) %(message)s',
)

e = threading.Event()
t1 = threading.Thread(
    name='block',
    target=wait_for_event,
    args=(e,),
)
t1.start()

t2 = threading.Thread(
    name='nonblock',
    target=wait_for_event_timeout,
    args=(e, 2),
)
t2.start()

logging.debug('Waiting before calling Event.set()')
time.sleep(0.3)
e.set()
logging.debug('Event is set')

Posted by: Guest on July-10-2021

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