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POWith python.multiprocessing, how do I create a proxy in the current process to pass to other processes?
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  1. POWith python.multiprocessing, how do I create a proxy in the current process to pass to other processes?
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    copied!<p>I'm using the <code>multiprocessing</code> library in Python. I can see how to define that objects <em>returned</em> from functions should have proxies created, but I'd like to have objects in the current process turned into proxies so I can pass them as parameters.</p> <p>For example, running the following script:</p> <pre><code>from multiprocessing import current_process from multiprocessing.managers import BaseManager class ProxyTest(object): def call_a(self): print 'A called in %s' % current_process() def call_b(self, proxy_test): print 'B called in %s' % current_process() proxy_test.call_a() class MyManager(BaseManager): pass MyManager.register('proxy_test', ProxyTest) if __name__ == '__main__': manager = MyManager() manager.start() pt1 = ProxyTest() pt2 = manager.proxy_test() pt1.call_a() pt2.call_a() pt1.call_b(pt2) pt2.call_b(pt1) </code></pre> <p>... I get the following output ...</p> <pre><code>A called in &lt;_MainProcess(MainProcess, started)&gt; A called in &lt;Process(MyManager-1, started)&gt; B called in &lt;_MainProcess(MainProcess, started)&gt; A called in &lt;Process(MyManager-1, started)&gt; B called in &lt;Process(MyManager-1, started)&gt; A called in &lt;Process(MyManager-1, started)&gt; </code></pre> <p>... but I want that final line of output coming from <code>_MainProcess</code>. </p> <p>I could just create another Process and run it from there, but I'm trying to keep the amount of data that needs to be passed between processes to a minimum. The documentation for the <code>Manager</code> object mentioned a <code>serve_forever</code> method, but it doesn't seem to be supported. Any ideas? Does anyone know?</p>
 

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