Improving the web page download code.
MRAB
python at mrabarnett.plus.com
Wed Aug 28 11:12:40 EDT 2013
On 28/08/2013 07:23, mukesh tiwari wrote:
[snip]
> Initially I blocked the main using raw_input('') and it was working fine.
>
> 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 , () )
> #This is for blocking main
> raw_input('')
> When I pressed ctrl-c then it's responding fine but now after switching to threading module, I am not able to kill my program using SIGINT ( ctrl-c ). Any idea how to signal SIGINT to threads ?
>
Try making them daemon threads. A daemon thread is one that will be
killed when the main thread terminates.
> Now the changed code and I have to catch the SIGINT.
> u = Downloader()
> signal.signal( signal.SIGINT , u.handleexception)
> urlcreator = threading.Thread ( target = u.createurl )
>
> workers = []
> for i in xrange ( 5 ):
> workers.append ( threading.Thread( target = u.downloadurl ) )
>
urlcreator.daemon = True
> urlcreator.start()
> for w in workers:
urlcreator.daemon = True
w.daemon = True
> w.start()
>
> urlcreator.join()
> for w in workers:
> w.join()
>
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