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PythonEngine fails to initialize in VSIX extension#2405

Closed Answeredbycpgames
cpgames asked this question inQ&A
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Environment

  • Pythonnet version: 3.0.3, 3.1.0
  • Python version: 3.09
  • Operating System: Win11
  • .NET Runtime: 4.8

Details

  • Describe what you were trying to get done.

I am trying to use pythonnet package in a VSIX Visual Studio extension.
The Experimental VS Instance initializes pythonnet fine, however deploying an extension causes this crash.
I suspect there may be some threading issues, but am not sure what to look for.

try{    Runtime.PythonDLL = pythonFile.FullName;    PythonEngine.PythonHome = pythonFile.DirectoryName!;    OutputWindowHelper.LogInfo("PythonEngine", "Initializing Python engine.");    PythonEngine.Initialize(); // crash here    PythonEngine.BeginAllowThreads();}catch (Exception ex){    OutputWindowHelper.LogError(ex);}
  • If there was a crash, please include the traceback here.
[INFO] - PythonEngine: Initializing Python engine.[ERROR]: Object reference not set to an instance of an object.[TRACE]:    at Python.Runtime.ClassManager.GetClassInfo(Type type, ClassBase impl)   at Python.Runtime.ClassManager.InitClassBase(Type type, ClassBase impl, ReflectedClrType pyType)   at Python.Runtime.ReflectedClrType.GetOrCreate(Type type)   at Python.Runtime.ModuleObject.GetAttribute(String name, Boolean guess)   at Python.Runtime.ModuleObject.LoadNames()   at Python.Runtime.ImportHook.UpdateCLRModuleDict()   at Python.Runtime.PythonEngine.Initialize(IEnumerable`1 args, Boolean setSysArgv, Boolean initSigs)   at Python.Runtime.PythonEngine.Initialize()   at cpGames.VSA.ToolAPI.<InitializePythonEngineAsync>d__2.MoveNext() in ToolAPI.cs:line 69 // PythonEngine.Initialize(); call
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Why you close my issue?

Here's your fix:

internal static bool ShouldBindEvent(EventInfo ei)        {            var mb = ei.GetAddMethod(true);            if (mb == null)            {                return false;            }            return ShouldBindMethod(mb);        }

Check your nulls, thank me later.

Replies: 2 comments

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Why you close my issue?

Here's your fix:

internal static bool ShouldBindEvent(EventInfo ei)        {            var mb = ei.GetAddMethod(true);            if (mb == null)            {                return false;            }            return ShouldBindMethod(mb);        }

Check your nulls, thank me later.

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0 replies
Answer selected bycpgames
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Hello ,

I have the same issue, I am trying to use pythonnet package in a VSIX Visual Studio extension.

image

I am going to apply this fix above made by@cpgames and see if the problem persists.

Do you intend to release this fix in a future version of pythonnet ?

Regards,

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@cpgames@adrctr
Converted from issue

This discussion was converted from issue #2404 on June 23, 2024 07:54.

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