[python-win32] Threading Issue
Jim Vickroy
Jim.Vickroy at noaa.gov
Tue Jul 3 23:49:58 CEST 2007
James Matthews wrote:
> Thanks Emlyn
>
> Just one more issue i have here. When i pass a string as an argument
> to the thread it seems to call the method returning the string as a
> tuple and i get an error that the method gets 48 arguments and it can
> only accept 2?
>
> If this doesn't make sense here is the code.
>
> for links in urls:
> links_thread =
> threading.Thread(target=self.next_page_finder,args=links) # Links is a
> string
that argument (i.e., links) is expected to be a python tuple so what you
need is:
links_thread =
threading.Thread(target=self.next_page_finder,args=(links,))
> threaded_objects.append(links_thread)
> I get this error:
> Exception in thread Thread-1:
> Traceback (most recent call last):
> File "C:\Python25\lib\threading.py", line 460, in __bootstrap
> self.run()
> File "C:\Python25\lib\threading.py", line 440, in run
> self.__target(*self.__args, **self.__kwargs)
> TypeError: next_page_finder() takes exactly 2 arguments (48 given)
>
> Thanks
>
> James
>
>
> On 7/3/07, * Emlyn Jones* <emlynj at gmail.com <mailto:emlynj at gmail.com>>
> wrote:
>
> On 7/3/07, Emlyn Jones <emlynj at gmail.com
> <mailto:emlynj at gmail.com>> wrote:
> > On 7/3/07, Tim Roberts <timr at probo.com <mailto:timr at probo.com>>
> wrote:
> > James Matthews wrote:
> > > > So i need to make the list a global variable
> > >
> > > No, that's not what he did at all. The names just happened to
> be the
> > > same, that's all. Consider it this way:
> > >
> > > import threading
> > > def foo( threadresult ):
> > > threadresult.extend( range(4) )
> > >
> > > result = list()
> > > thread = threading.Thread (target=foo, args=(result,))
> > > thread.start()
> > > result
> > >
>
> How about using an object derived from Thread and making 'result' a
> member of it?
>
> http://docs.python.org/lib/thread-objects.html
>
> You'd probably also want a variable to tell you if the function
> has finished.
>
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