what is a daemon thread python

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

python daemon thread

import threading
import time
 
shared_resource = False # Set the resource to False initially
lock = threading.Lock() # A lock for the shared resource
 
def perform_computation():
    # Thread A will call this function and manipulate the resource
    print(f'Thread {threading.currentThread().name} - performing some computation....')
    shared_resource = True
    print(f'Thread {threading.currentThread().name} - set shared_resource to True!')
    print(f'Thread {threading.currentThread().name} - Finished!')
    time.sleep(1)
 
def monitor_resource():
    # Thread B will monitor the shared resource
    while shared_resource == False:
        time.sleep(1)
    print(f'Daemon Thread {threading.currentThread().name} - Detected shared_resource = False')
    time.sleep(1)
    print(f'Daemon Thread {threading.currentThread().name} - Finished!')
 
 
if __name__ == '__main__':
    a = threading.Thread(target=perform_computation, name='A')
    b = threading.Thread(target=monitor_resource, name='B', daemon=True) # Make thread B as a daemon thread
 
    # Now start both threads
    a.start()
    b.start()

Posted by: Guest on January-22-2021

Source

import threading import time def print_work_a(): print('Starting of thread :', threading.currentThread().name) time.sleep(2) print('Finishing of thread :', threading.currentThread().name) def print_work_b(): print('Starting of thread :', threading.currentThread().name) print('Finishing of thread :', threading.currentThread().name) a = threading.Thread(target=print_work_a, name='Thread-a') b = threading.Thread(target=print_work_b, name='Thread-b') a.start() b.start()

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