I already asked directely into Steve Baer wordpress blog, before knowing the existance of such a community around mcNeel products.
I usually write my scripts throught the ironPython Grasshopper editor.
I’m having some trouble with the import of the multiprocessing module in my script.
This is the error:
line 16, in , “C:\Program Files\Rhinoceros 5 (64-bit)\Plug-ins\IronPython\Lib\multiprocessing_init_.py”
After verifying that it works fine in the ironPython IDE, I didn’t solve the problem.
After some search i’ve found there are some troubles in translating Python module into ironPython module.
What am I doing wrong?
The version doc says it’s the 2.7.0 beta version, in fact.
I’m trying to handle a python script built into the grasshopper python extension shell.
It is a sort of raytracing, and it is quite slow. I’m trying to speed it up, and i’ve got some problems with the parallel class of the threading module. Due to data order it seems the best way is the multiprocessing, and i’d need to implement it into the RhinoPython editor.
Is there a way to manually update the ironPython version of Rhino?
Even if I did started as many threads as the number of rays, it seems that no time has been saved in the computing than serial processing. It’s strange, because it should be able to work separately on each ray.
If you aren’t seeing a speed-up then I doubt multiprocessing is going to make things any different. Can you show a small sample of how you are trying to use the parallel class? We may be talking about different things.
Thanks Steve, but the the script with the ghpython parallel module was not a problem. Or better, it was a problem because of its unreliability/instability during an optimization process. It sometimes got failed. More the sometimes, often…
That’s why I was looking for another way.
I’ve done other attempt with the Rhino.Geometry module instead of rhinoscriptsyntax, and it is quite always 30% better, that is a great improvement in my humble opinion.
This is kind of random error that gives me back while using the parallel module.
I say random because the code sometimes works, sometimes not, without any kind of change neither in the code nor in the input.
Runtime error (ValueErrorException): unable to convert 0742a862-0bc5-4cda-ab21-8bf8a8239491 into Curve geometry.
It’s quite strange, it seems there is an unknown random data structure changing.
Sorry to resuscitate such a long time closed post but my problem is exactly what its title is! I’m also looking to process mesh vertices in a parallel manner but also find myself unable to even import the multiprocessing module into my python script (trying to execute it from Rhino interpreter started with _EditPythonScript).
I am trying to do a similar task through Rhino interpreter. This page ( https://ironpython-test.readthedocs.io/en/latest/library/threading.html ) suggests that multithread in Cpython won’t improve the performance due to the GIL. I wonder whether this is also the case for Ironpython? If so, can I include the multiprocessing module as 3rd party library to the older version of Ironpython that Rhino 5 uses?
Basically, I want to implement a SunHourAnalysis directly from Rhino python to boost performance. I know Ladybug has a component does the same work. But it always seems to me working with large computation in GH is not stable. I am aware of two packages the can do the work (both from Steve’s blog):
I just wonder when working directly from Rhino python, which one has better performace? Or is there any other solution now become available after this post.