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<P><FONT SIZE=2 FACE="Arial">From </FONT><A HREF="http://twistedmatrix.com/projects/core/documentation/howto/threading.html"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://twistedmatrix.com/projects/core/documentation/howto/threading.html</FONT></U></A><FONT SIZE=2 FACE="Arial">:</FONT>
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<P><FONT SIZE=2 FACE="Arial">I copied the code below and ran it as:</FONT>
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<P><FONT SIZE=2 FACE="Arial">$ cat twisted-threadpool.py </FONT>
<BR><FONT SIZE=2 FACE="Arial">#!/usr/bin/env python</FONT>
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<P><FONT SIZE=2 FACE="Arial">from twisted.internet import reactor</FONT>
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<P><FONT SIZE=2 FACE="Arial">def aSillyBlockingMethod(x):</FONT>
<BR><FONT SIZE=2 FACE="Arial"> import time</FONT>
<BR><FONT SIZE=2 FACE="Arial"> time.sleep(2)</FONT>
<BR><FONT SIZE=2 FACE="Arial"> print x</FONT>
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<P><FONT SIZE=2 FACE="Arial"># run method in thread</FONT>
<BR><FONT SIZE=2 FACE="Arial">reactor.callInThread(aSillyBlockingMethod, "2 seconds have passed")</FONT>
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<P><FONT SIZE=2 FACE="Arial">$ ./twisted-threadpool.py </FONT>
<BR><FONT SIZE=2 FACE="Arial">2 seconds have passed</FONT>
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<P><FONT SIZE=2 FACE="Arial">But I note that the program never stops. I infer that least one thread is getting set as a non-daemon thread, according to python's thread rules on program termination:</FONT></P>
<P><FONT SIZE=2 FACE="Arial"> `thread.setDaemon(daemonic)'</FONT>
<BR><FONT SIZE=2 FACE="Arial"> Set the thread's daemon flag to the Boolean value DAEMONIC. This</FONT>
<BR><FONT SIZE=2 FACE="Arial"> must be called before `start()' is called.</FONT>
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<P><FONT SIZE=2 FACE="Arial"> The initial value is inherited from the creating thread.</FONT>
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<P><FONT SIZE=2 FACE="Arial"> The entire Python program exits when no active non-daemon threads</FONT>
<BR><FONT SIZE=2 FACE="Arial"> are left.</FONT>
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<P><FONT SIZE=2 FACE="Arial">Is there a way to set this program up such that the program will exit when all of the threads registered via callInThread, and the main thread, have exited?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Thanks,</FONT>
<BR><FONT SIZE=2 FACE="Arial">-- </FONT>
<BR><FONT SIZE=2 FACE="Arial">Benjamin Rutt</FONT>
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