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Python.net crashes with Python 3.13 and 3.14 #2489

Description

@gusmanb

Environment

  • Pythonnet version: 3.0.4
  • Python version: 3.13 and 3.14 alpha
  • Operating System: Windows 11 64 bits
  • .NET Runtime: .net 8.0

Details

Trying to initialize pythonnet with Python 3.13 or higher crashes with MissingMethodException: Failed to load symbol _PyThreadState_UncheckedGet

void Initialize()
{
    Runtime.PythonDLL = "path_to_dll";
    PythonEngine.Initialize(); //crash
}
  • StackTrace:
 en Python.Runtime.Runtime.Delegates.get_Py_IsInitialized()
   en Python.Runtime.Runtime.Py_IsInitialized()
   en Python.Runtime.Runtime.<>c.<Initialize>b__32_0()
   en Python.Runtime.Runtime.TryUsingDll[T](Func`1 op)
   en Python.Runtime.Runtime.Initialize(Boolean initSigs)
   en Python.Runtime.PythonEngine.Initialize(IEnumerable`1 args, Boolean setSysArgv, Boolean initSigs)
   en Python.Runtime.PythonEngine.Initialize(Boolean setSysArgv, Boolean initSigs)
   en Python.Runtime.PythonEngine.Initialize()

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