[EMAIL PROTECTED] wrote: > Hi > > I've aquired a program written in Python, and without much knowledge of > the language I'm trying to make some changes to it. The original > program starts, runs a certain process and then finishes. I want to > adapt it so that, at a certain stage of the process, a new process is > started from scratch, running at the same time as the original one. > When the original one is finished, it should exit without causing the > newer process to stop. > > I've successfully achieved this using sys.popen methods to start > separate processes, but come to realise that running seperate processes > is not a very good solution, since it uses up more memory and becomes > harder to manage. I'd like the same thing to be achieved using threads. > > I've come as far as being able to start the program which runs the > first thread. My problem arrises when I want the new thread to be > started. It seems that if I do this by calling a function from within > the thread, I'm unable to stop the original thread whenever that > finishes. I imagine that what I've achieved is something like: > > Start file (eg start.py) starts Thread 1 > Thread 1 starts a new thread (Thread 2) and becomes the parent of that > thread > Thread 2 starts a new thread (Thread 3)... and so on > > I think that what I want is something like: > > Start file starts Thread 1 > Thread 1 informs start file that a new thread should be started; start > file starts Thread 2 > .... and so on > > So, if my thinking so far is correct, how can a thread cause another > thread to be started without becoming its parent? > Read up on "demonised" (sp?) threads in the documentation from threading.
regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
