Hi pythonnet members, The next working group call will be held at 3pm EST on Tuesday, October 22, 2019. You can join here: https://unity3d.zoom.us/j/346931511 <https://unity3d.zoom.us/j/346931511>
The agenda is here: https://docs.google.com/document/d/1rJVU84B_dgx58-_EopjRtOJVFAI2WfHJYV0n7uE1Oak <https://docs.google.com/document/d/1rJVU84B_dgx58-_EopjRtOJVFAI2WfHJYV0n7uE1Oak> Please feel free to add items directly to the document or in reply to this e-mail. cheers, -Mark Mark Visser Tooling Dev Manager Unity Technologies - www.unity3d.com <http://www.unity3d.com/> > On Sep 24, 2019, at 4:04 PM, Mark Visser <ma...@unity3d.com> wrote: > > Attendees: Mark Visser (Unity), Benoit Hudson & Felix Bourbonnais (ImgSpc), > Victor Milovanov, Mohamed Koubaa (ANSYS Inc), Amos Li > > Agenda > > 1. (Mark) Suggest we use a "needs discussion" label on issues and PRs for > next time. Then we can just go through them on the call. > 2. (Mark) Can we get a status update on joining the .NET Foundation? Github > issue: Joining the .NET Foundation > <https://github.com/pythonnet/pythonnet/issues/956> > 3. (Benoit) Python can't reliably re-initialize; new proposal for Unity's > domain reload <https://github.com/pythonnet/pythonnet/issues/957> > 4. (Benoit) What's the policy with the GIL? Main thread appears to be > grabbing the lock and not releasing it. > 5. (Mohamed) Can I get clarification on IWrapper vs. reflection for PR #808? > > Notes > > Welcome to new contributor Mohamed Koubaa (ANSYS), who is investigating > moving his company's platform from IronPython to CPython. > > 1 & 2) need input from Benedikt, Mark will follow up with Benedikt. > > 4) > Benoit: GIL - Should we expect the GIL to be held after initialization? > Victor: I wouldn't expect it to be held. [PyGIL] attribute is informational. > > 3) > Benoit: Python can't reliably re-initialize. > last fall's work - force PyFinalize to be called > unfortunately doesn't work for native extensions - can't reliably > reinitialize > proposal > instead of calling PyFinalize, delete all links from Python to C# > Felix prototyped a solution that tracks all links during proxy generation and > cuts all links during domain shutdown to prevent dereference of dead pointers > result is just AttributeError instead of crash > Amos proposed a different solution which seems to be targeting memory leaks > Victor: what about memory leaks? > C# side deletes all of its memory > If C# holds a reference to Python, it will still exist when C# shuts down - > no problem > Amos: has a branch that solves one of the problems > Benoit & Felix will investigate his branch and see where it intersects with > their solution > the reason we're using pythonnet is to enable PySide/PyQt and numpy among > others > > 5) Mohamed: Working on a small change to implement the wrapper function for > console output via __repr__ https://github.com/pythonnet/pythonnet/pull/808 > <https://github.com/pythonnet/pythonnet/pull/808> > inheritance over reflection, IWrapper vs. method with a signature Pythonnet > can reflect > what are the pros and cons? should we go with a convention? > Victor: you can take the reflection approach, but need to cache the delegates > more of an implementation detail, not actually necessary > > (note: any errors in the above are mine, feel free to correct any gross > misrepresentations I've inadvertently made!) > > Action Items > > Mark > follow up with Benedikt about Python foundation and using issues to track > discussion items > Benoit & Felix > investigate why GIL is held indefinitely > test out Amos's branch and connect over gitter to discuss what parts of the > problem each approach is solving > > Thank you all for attending! The next call will be held at 3pm EST on > Tuesday, October 8th, 2019, see you then. Please e-mail me if you're not on > the attendee list and I will add you. > > Mark Visser > Tooling Dev Manager > Unity Technologies - www.unity3d.com <http://www.unity3d.com/> > > > >
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