python daemon thread

1import threading
2import time
3
4def func_1():
5    while True:
6        print(f"[{threading.current_thread().name}] Printing this message every 2 seconds")
7        time.sleep(2)
8
9# initiate the thread with daemon set to True
10daemon_thread = threading.Thread(target=func_1, name="daemon-thread", daemon=True)
11# or
12# daemon_thread.daemon = True
13# or
14# daemon_thread.setDaemon(True)
15daemon_thread.start()
16# sleep for 10 seconds and end the main thread
17time.sleep(4)
18# the main thread ends

1import threading
2import time
3
4def thread_function(name):
5     print(f"Thread {name}: starting")
6     time.sleep(2)
7     print(f"Thread {name}: finishing")
8 
9my_thread = threading.Thread(target=thread_function, args=(1,))
10my_thread.start()
11time.sleep(1)
12my_second_thread = threading.Thread(target=thread_function, args=(2,))
13my_second_thread.start()
14my_second_thread.join() # Wait until thread finishes to exit

1import threading
2import time
3 
4shared_resource = False # Set the resource to False initially
5lock = threading.Lock() # A lock for the shared resource
6 
7def perform_computation():
8    # Thread A will call this function and manipulate the resource
9    print(f'Thread {threading.currentThread().name} - performing some computation....')
10    shared_resource = True
11    print(f'Thread {threading.currentThread().name} - set shared_resource to True!')
12    print(f'Thread {threading.currentThread().name} - Finished!')
13    time.sleep(1)
14 
15def monitor_resource():
16    # Thread B will monitor the shared resource
17    while shared_resource == False:
18        time.sleep(1)
19    print(f'Daemon Thread {threading.currentThread().name} - Detected shared_resource = False')
20    time.sleep(1)
21    print(f'Daemon Thread {threading.currentThread().name} - Finished!')
22 
23 
24if __name__ == '__main__':
25    a = threading.Thread(target=perform_computation, name='A')
26    b = threading.Thread(target=monitor_resource, name='B', daemon=True) # Make thread B as a daemon thread
27 
28    # Now start both threads
29    a.start()
30    b.start()
31

1
2import threading
3import time
4
5
6def print_work_a():
7    print('Starting of thread :', threading.currentThread().name)
8    time.sleep(2)
9    print('Finishing of thread :', threading.currentThread().name)
10
11
12def print_work_b():
13    print('Starting of thread :', threading.currentThread().name)
14    print('Finishing of thread :', threading.currentThread().name)
15
16a = threading.Thread(target=print_work_a, name='Thread-a')
17b = threading.Thread(target=print_work_b, name='Thread-b')
18
19a.start()
20b.start()
21
22