Python Cleanup

[roaldarbol]

Heya! I'm using the Python.Scripting extension to interact with a micropython controller. As part of that, I need to ensure that the connection to the device is closed when the workflow is stopped manually. I'm trying to figure out the best way to do this - so either by clicking the Stop button in the GUI or something similarly simple. I imagine that there must be other libraries such as Arduino or Harp that makes connections to microcontrollers that have met this problem before?

@bruno-f-cruz suggested to use KeyDown->Take->WorkflowOutput, which on its own works, but when you introduce Eval (any Python node I guess) it crashes Bonsai with the following error message:

Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at Python.Runtime.Runtime.PyRun_String(String code, RunFlagType st, BorrowedReference globals, BorrowedReference locals)       
   at Python.Runtime.PyModule.Eval(String code, PyDict locals)
   at System.Reactive.Linq.ObservableImpl.Select`2._.OnNext(TSource value)
   at System.Reactive.AutoDetachObserver`1.OnNextCore(T value)
   at System.Reactive.ObserverBase`1.OnNext(T value)
   at System.Reactive.Linq.ObservableImpl.Do`1._.OnNext(TSource value)
   at System.Reactive.Linq.ObservableImpl.Take`1._.OnNext(TSource value)
   at System.Reactive.AutoDetachObserver`1.OnNextCore(T value)
   at System.Reactive.ObserverBase`1.OnNext(T value)
   at System.Reactive.Linq.ObservableImpl.Do`1._.OnNext(TSource value)
   at System.Reactive.Linq.ObservableImpl.Where`1._.OnNext(TSource value)
   at Bonsai.Windows.Input.InterceptKeys.HookCallback(Int32 nCode, IntPtr wParam, IntPtr lParam)

I would highly appreciate any ideas of alternative solutions or help debugging the above error.

[bruno-f-cruz]

Can you share the code of your project? thanks!

[roaldarbol]

Sure thing! What do you need? Here's the .bonsai file:
workflow.zip

[roaldarbol]

Ah, I solved it by adding in ObserveOnGIL!