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Re: Please help with Threading

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From Peter Otten <__peter__@web.de>
Subject Re: Please help with Threading
Date Sat, 18 May 2013 11:09:03 +0200
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Jurgens de Bruin wrote:

> This is my first script where I want to use the python threading module. I
> have a large dataset which is a list of dict this can be as much as 200
> dictionaries in the list. The final goal is a  histogram for each dict 16
> histograms on a page ( 4x4 ) - this already works.
> What I currently do is a create a nested list [ [ {}  ], [ {} ] ] each
> inner list contains 16 dictionaries, thus each inner list is a single page
> of 16 histograms. Iterating over the outer-list  and creating the graphs
> takes to long. So I would like multiple inner-list to be processes
> simultaneously and creating the graphs in "parallel".
> I am trying to use the python threading for this. I create 4 threads loop
> over the outer-list and send a inner-list to the thread. This seems to
> work if my nested lists only contains 2 elements - thus less elements than
> threads. Currently the scripts runs and then seems to get hung up. I
> monitor the resource  on my mac and python starts off good using 80% and
> when the 4-thread is created the CPU usages drops to 0%.
> 
> My thread creating is based on the following :
> http://www.tutorialspoint.com/python/python_multithreading.htm
> 
> Any help would be create!!!

Can you show us the code?

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Thread

Please help with Threading Jurgens de Bruin <debruinjj@gmail.com> - 2013-05-18 01:58 -0700
  Re: Please help with Threading Peter Otten <__peter__@web.de> - 2013-05-18 11:09 +0200
    Re: Please help with Threading Jurgens de Bruin <debruinjj@gmail.com> - 2013-05-18 04:23 -0700
      Re: Please help with Threading Peter Otten <__peter__@web.de> - 2013-05-18 14:01 +0200
  Re: Please help with Threading Dave Angel <davea@davea.name> - 2013-05-18 09:55 -0400
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-18 15:28 -0400
  RE: Please help with Threading Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-19 03:02 +0300
  Re: Please help with Threading Chris Angelico <rosuav@gmail.com> - 2013-05-19 10:38 +1000
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-19 17:46 -0400
  Re: Please help with Threading Chris Angelico <rosuav@gmail.com> - 2013-05-20 07:52 +1000
  Re: Please help with Threading Dave Angel <davea@davea.name> - 2013-05-19 21:04 -0400
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-19 22:58 -0400
  Re: Please help with Threading Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-05-19 23:25 -0400
  Re: Please help with Threading Fábio Santos <fabiosantosart@gmail.com> - 2013-05-20 07:25 +0100
  Re: Please help with Threading Jurgens de Bruin <debruinjj@gmail.com> - 2013-06-02 18:47 -0700

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