It's a backend issue:the code works with wxagg but not with gtkagg. On 1 November 2010 00:54, Sameer Grover <sameer.grove...@gmail.com> wrote: > Can matplotlib be used in scripts with multiple processes, such as > when using the multiprocessing module? > > I had some difficulty getting code to work in which I was carrying out > some long computations and wanted to show intermediate results in a > separate process so as not to interrupt the main computation. The > problem distilled down to trying to use the multiprocessing module and > matplotlib together. This is a code snippet which I expected to work, > but doesn't. Is this a matplotlib issue, some intricate issue with > GUIs and processes, or something with my understanding of the subject? > > Would you expect this code to work? Is there any easy workaround? > > from pylab import * > import multiprocessing > class myclass(object): > def plotter(self): > plot([1,2,3,4]) > show() > def mainfunction(self): > a = arange(1, 10, 0.1) > newprocess = multiprocessing.Process(target=self.plotter) > newprocess.start() > newprocess.join() > plot(a, sin(a)) > show() > if __name__== '__main__': > a = myclass() > a.mainfunction() > > Thanks, > Sameer >
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