I'm running this simple code:
import threading, time
class reqthread(threading.Thread):
def run(self):
for i in range(0, 10):
time.sleep(1)
print('.')
try:
thread = reqthread()
thread.start()
except (KeyboardInterrupt, SystemExit):
print('\n! Received keyboard interrupt, quitting threads.\n')
But when I run it, it prints
$ python prova.py
.
.
^C.
.
.
.
.
.
.
.
Exception KeyboardInterrupt in <module 'threading' from '/usr/lib/python2.6/threading.pyc'> ignored
In fact python thread ignore my Ctrl+C keyboard interrupt and doesn't print Received Keyboard Interrupt
. Why? What is wrong with this code?
Try
try:
thread=reqthread()
thread.daemon=True
thread.start()
while True: time.sleep(100)
except (KeyboardInterrupt, SystemExit):
print '\n! Received keyboard interrupt, quitting threads.\n'
Without the call to time.sleep
, the main process is jumping out of the try...except
block too early, so the KeyboardInterrupt
is not caught. My first thought was to use thread.join
, but that seems to block the main process (ignoring KeyboardInterrupt) until the thread
is finished.
thread.daemon=True
causes the thread to terminate when the main process ends.