Mailman 3 December 2019 - Python.NET

Multithreading/multiprocessing
by Alan Macdonald May 5, 2025

May 5, 2025

Hello, has anyone successfully used multithreading or multiprocessing with Python.Net? I tried to multi-thread from the .Net side and the Python.Net libraries seem to have issues in the RunScript method. I had to take an implementation off the web of that method because the shipped method doesn’t seem to work. I then had a working multi-processing example from CPython that I tried from Python.Net but it gives an error 'module' object has no attribute 'argv' When trying to create a process pool by executing the line pool = Pool(processes=4) Is it possible to do multithreading or multiprocessing with Python.Net? Thanks, Alan

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Working group meeting notes for December 5, 2019 - CANCELLED
by Mark Visser Jan. 16, 2020

Jan. 16, 2020

Attendees: Mohamed, Amos, Mark Agenda Review action items from last meeting: Benedikt - continue working on joining .NET foundation Benoit - multithreaded python code ? - breaking up Quantconnect PR ? - github actions Amos - continue breaking up pull 958 into smaller PRs to make it easier to review and merge. e.g. have a single PR that gets reference counts right and doesn't touch GC chains. See Benoit's example of the __import__ restore PR for best practices. Amos - same for other older PRs Benedikt - will try to reproduce PyBuffer crash locally Benedikt - will check if there are any breaking changes since 2.4.0 Benedikt - continue exploring CLR loader, splitting parts into separate Python interop DLLs, have main Python runtime implement layers on top Notes Quorum not reached, meeting cancelled The meeting notes google doc is here <https://docs.google.com/document/d/1rJVU84B_dgx58-_EopjRtOJVFAI2WfHJYV0n7uE…>. Feel free to correct or add additional information. The next meeting will be held on Thursday, December 19th at 12pm EST, 9am PST, 6pm CET, 1am China. Mark Visser Tooling Dev Manager Unity Technologies - www.unity3d.com <http://www.unity3d.com/>

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Working group meeting notes for December 19, 2019
by Mark Visser Dec. 19, 2019

Dec. 19, 2019

Attendees: Benedikt, Victor, Amos, Mohamed, Mark Agenda Review action items from last meeting: Benedikt - continue working on joining .NET foundation Benoit - multithreaded python code ? - breaking up Quantconnect PR ? - github actions Amos - continue breaking up pull 958 into smaller PRs to make it easier to review and merge. e.g. have a single PR that gets reference counts right and doesn't touch GC chains. See Benoit's example of the __import__ restore PR for best practices. Amos - same for other older PRs Benedikt - will try to reproduce PyBuffer crash locally Benedikt - will check if there are any breaking changes since 2.4.0 Benedikt - continue exploring CLR loader, splitting parts into separate Python interop DLLs, have main Python runtime implement layers on top Victor - Perf runs in CI Review PRs Mailing list currently moderated - @markv asked for ownership to be transferred to Benedikt Notes joining .NET process had changed, Benedikt working on it Pull 958 (domain reload handling) split PRs being approved and merged, thanks Amos! github actions if we join .NET we can stay on current setup would be nice to have Darwin CI working PyBuffer nothing done yet CLR loader modernization PR has a single build Python 2 should still work, but Benedikt won't spend a lot of time on Python 2, 3.5+ is current focus moved code and tests into separate directories removed old csproj file in favour of small project files generated using .NET CLI goal is a fully building project using .NET CLI that is operating system independent made a small pythonnet module that will be the future entry point still rough, testing currently with core CLR and Mono on Linux loading works, P/Invoke __internal breaks on .NET core Python functions have been split out into an interface using T4 templates ready for early review if you can take a look Performance tests and CI not very stable if we put in CI, fail depending on weather conditions no way to put in CI without random failures maybe makes sense to keep it as an ongoing statistic on master and not blocking PRs useful for running locally on branch vs. master to check for regressions still informative for detecting regressions - we can run it on every PR, but it shouldn't result in a hard error - can we report it on the PR? perf comparison is relative, so different machines shouldn't affect the result Mailing list keep it, but remove moderation, transfer ownership to Benedikt Improve method binding PR #974 discussion Meeting on January 2 is cancelled, next meeting will be in 4 weeks on Thursday, January 16, 2020 Action Items Benedikt will continue working on .NET foundation application Victor will take a look at the CLR loader PR, looks big though Victor will look into if we can generate perf stats through AppVeyor and Travis Victor will publish a PR for conversion config Mohamed will split PR #974 Benoit - multithreaded python code ? - breaking up Quantconnect PR Benedikt - will try to reproduce PyBuffer crash locally The meeting notes google doc is here <https://docs.google.com/document/d/1rJVU84B_dgx58-_EopjRtOJVFAI2WfHJYV0n7uE…>. Feel free to correct or add additional information. Please note there will be no meeting on January 2nd. The next meeting will be held on Thursday, January 16th at 12pm EST, 9am PST, 6pm CET, 1am China. Happy holidays! Mark Visser Tooling Dev Manager Unity Technologies - www.unity3d.com <http://www.unity3d.com/>

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Fwd: 4 PythonDotNet moderator request(s) waiting
by Denis Akhiyarov Dec. 19, 2019

Dec. 19, 2019

Since no one is moderating this pythondotnet mailing list, I would like to archive this mailing list unless someone is willing to take over? I will wait for one week. I’m no longer involved with the project. Thanks, Denis ---------- Forwarded message --------- From: <pythondotnet-bounces(a)python.org> Date: Wed, Dec 18, 2019 at 7:00 AM Subject: 4 PythonDotNet moderator request(s) waiting To: <pythondotnet-owner(a)python.org> The PythonDotNet(a)python.org mailing list has 4 request(s) waiting for your consideration at: https://mail.python.org/mailman/admindb/pythondotnet Please attend to this at your earliest convenience. This notice of pending requests, if any, will be sent out daily. Pending posts: From: kennywc.lin(a)gmail.com on Sun Nov 24 04:55:14 2019 Subject: C# assembly module importing error using pythonnet after .py to .pyd conversion. Cause: Post by non-member to a members-only list From: benoit.hudson(a)imaginary-spaces.com on Thu Dec 5 14:55:17 2019 Subject: Re: [Python.NET] Working group meeting notes for December 5, 2019 - CANCELLED Cause: Post to moderated list From: johanna01(a)worldchemforum.com on Fri Dec 6 11:20:07 2019 Subject: Confirmation for World Chemistry Forum, May 22-24, 2020 in Osaka Cause: Post by non-member to a members-only list From: info(a)comms.yahoo.net on Thu Dec 12 08:00:47 2019 Subject: Next Steps: The Evolution of Yahoo Groups (Final Notification) Cause: Post by non-member to a members-only list

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