PythonEngine fails to initialize in VSIX extension #2404
Description
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