On 27/08/2013 21:53, mukesh tiwari wrote:
On Wednesday, 28 August 2013 01:49:59 UTC+5:30, MRAB wrote:
On 27/08/2013 20:41, mukesh tiwari wrote:
[snip]
>> > if __name__== '__main__':
>> > u = Downloader()
>> > signal.signal( signal.SIGINT , u.handleexception)
>> > thread.start_new_thread ( u.createurl , () )
>> > for i in xrange ( 5 ) :
>> > thread.start_new_thread ( u.downloadurl , () )
>> > while True : pass
>> >
>> >
>> My preferred method when working with background threads is to put a
>> sentinel such as None at the end and then when a worker gets an item
>> from the queue and sees that it's the sentinel, it puts it back in
>> the queue for the other workers to see, and then returns
>> (terminates). The main thread can then call each worker thread's
>> .join method to wait for it to finish. You currently have the main
>> thread running in a 'busy loop', consuming processing time doing
>> nothing!
>
> Hi MRAB,
> Thank you for the reply. I wrote this while loop only because of
> there is no thread.join in thread[1] library but I got your point. I
> am simply running a while loop for doing nothing. So if somehow I can
> block the main without too much computation then it will great.
>
Why don't you use the 'threading' module instead?
creator = threading.Thread(target=u.createurl)
workers = []
for i in xrange(5):
workers.append(threading.Thread(target=u.downloadurl))
creator.start()
for w in workers:
w.start()
creator.join()
for w in workers:
w.join()
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