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Memory not released upon multiple Initialize/Shutdown #2594

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@Ledragon

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@Ledragon

Exectuing the following code in a basic Console app leads to the application consuming more and more memory:

            Runtime.Runtime.PythonDLL = @"C:\ProgramData\WideTech\Python\python38.dll";
            PythonEngine.PythonHome = @"C:\ProgramData\WideTech\Python\";
            var count = 1000;
            for (int i = 0; i < count; i++)
            {
                PythonEngine.Initialize();
                PythonEngine.Shutdown();
            }

I am on windows 11 (64bit), using PythonNet v3.0.5, combined with Python 3.8 (happens with Python 3.12 as well).

For more context, we have a WebAPI that runs python 3 code that interacts with C# code. I tried avoiding initalization and shutdown systematically, but then I encounter API crashes. While current implementation might not be perfect (especially given 2008 - that we are facing as well, but is not the topic), it works, besides the increasing memory consumption.

Am I missing anything regarding resources freeing?

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