PythonEngine fails to initialize in VSIX extension #2405

cpgames · 2024-06-22T22:22:40Z

cpgames
Jun 22, 2024

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.

What commands did you run to trigger this issue? If you can provide a
Minimal, Complete, and Verifiable example
this will help us understand the issue.

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

Answered by cpgames

Jun 23, 2024

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.

View full answer

cpgames · 2024-06-23T10:24:15Z

cpgames
Jun 23, 2024
Author

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.

0 replies

adrctr · 2024-07-08T19:32:40Z

adrctr
Jul 8, 2024

Hello ,

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

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,

0 replies

Navigation Menu

Repository navigation

PythonEngine fails to initialize in VSIX extension #2405

Uh oh!

{{title}}

Uh oh!

Replies: 2 comments

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{editor}}'s edit

{{editor}}'s edit

Uh oh!

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{editor}}'s edit

{{editor}}'s edit

Uh oh!

Select a reply

Uh oh!

PythonEngine fails to initialize in VSIX extension #2405

Uh oh!

cpgames Jun 22, 2024

Environment

Details

Replies: 2 comments

Uh oh!

Uh oh!

cpgames Jun 23, 2024 Author

Uh oh!

Uh oh!

adrctr Jul 8, 2024

cpgames
Jun 22, 2024

cpgames
Jun 23, 2024
Author

adrctr
Jul 8, 2024