lesson03_excepthook.py

# SuperFastPython.com
# example of handling a thread's unexpected exception
from time import sleep
from threading import Thread
import threading

# custom exception hook
def custom_hook(args):
 # report the failure
 print(f'Thread failed: {args.exc_value}')

# target function that raises an exception
def task():
 # report a message
 print('Working...')
 # block for a moment
 sleep(1)
 # rise an "unexpected" exception
 raise Exception('Something bad happened')

# protect the entry point
if __name__ == '__main__':
 # register the exception hook function
 threading.excepthook = custom_hook
 # create a thread
 thread = Thread(target=task)
 # run the thread
 thread.start()
 # wait for the thread to finish
 thread.join()
 # report that the main thread is not dead
 print('Continuing on...')