Appending library directory to PythonPath causes crash

[pm64]

Environment

• Pythonnet version: 3.0.3
• Python version: 3.11.0 (main, Oct 24 2022, 18:26:48) [MSC v.1933 64 bit (AMD64)]
• Operating System: Windows and Linux
• .NET Runtime: 8.0

Details

The Python my app calls has a number of dependencies. For predictability, I want to bundle the dependencies with my app, rather than obtain them via pip at runtime. I gathered the entire dependency tree, as well as the .py file with the code I plan to directly call, and added it all to my Visual Studio project, using build action "Content" and CopyToOutputDirectory=PreserveNewest for each item.

If I didn't need these dependencies, I would call:

PythonEngine.Initialize();

That works great. But since I do require the dependencies, I append their root folder to PythonPath first:

var libPath = Path.Combine(Directory.GetCurrentDirectory(), "Python", "libs");
PythonEngine.PythonPath = PythonEngine.PythonPath + ";" + libPath;
PythonEngine.Initialize();

Simply appending libPath to PythonPath causes my app to crash on execution of PythonEngine.Initialize();

• If there was a crash, please include the traceback here.

Is there a recommended way to obtain the traceback? The crash causes the app to exit immediately, there is no exception caught by the debugger. I am more than happy to gather any diagnostic info needed.

[iPromKnight]

By no means an expert, in fact been using this for a day lol
BUt this is what I did

private void InitModules()
    {
        using var py = Py.GIL();
        _sys = Py.Import(SysModuleName);

        if (_sys == null)
        {
            _logger.LogError($"Failed to import Python module: {SysModuleName}");
            return;
        }

        _sys.path.append(Path.Combine(AppContext.BaseDirectory, "python"));

        _rtn = Py.Import(RtnModuleName);
        if (_rtn == null)
        {
            _logger.LogError($"Failed to import Python module: {RtnModuleName}");
        }
    }
    ```
    
    Where the packages I have bundled are in a python folder that gets copied to output dir

[duxuan11]

环境

• Pythonnet版本：3.0.3
• Python 版本：3.11.0 (main，2022 年 10 月 24 日，18:26:48) [MSC v.1933 64 位 (AMD64)]
• 操作系统：Windows和Linux
• .NET 运行时：8.0

细节

我的应用程序调用的 Python 有许多依赖项。为了可预测性，我希望将依赖项与我的应用程序捆绑在一起，而不是在运行时通过 pip 获取它们。我收集了整个依赖项树以及包含我计划直接调用的代码的 .py 文件，并将其全部添加到我的 Visual Studio 项目中，对每个项目使用构建操作“Content”和 CopyToOutputDirectory=PreserveNewest。

如果我不需要这些依赖项，我会调用：

PythonEngine.Initialize();

效果很好。但由于我确实需要依赖项，因此我首先将它们的根文件夹附加到 PythonPath：

var libPath = Path.Combine(Directory.GetCurrentDirectory(), "Python", "libs");
PythonEngine.PythonPath = PythonEngine.PythonPath + ";" + libPath;
PythonEngine.Initialize();

只需将 libPath 附加到 PythonPath 就会导致我的应用程序在执行 PythonEngine.Initialize() 时崩溃；

• 如果发生崩溃，请在此处包含回溯。

有没有推荐的方法来获取回溯？崩溃导致应用程序立即退出，调试器没有捕获任何异常。我非常乐意收集所需的任何诊断信息。

Do you have any solution?

[lostmsu]

On Windows you should be able to see the crash by debugging your app with mixed-mode debugging (or just native debugging) turned on. At least we need to know what kind of crash you experience.

[duxuan11]

Environment

• Pythonnet version: 3.0.3
• Python version: 3.11.0 (main, Oct 24 2022, 18:26:48) [MSC v.1933 64 bit (AMD64)]
• Operating System: Windows and Linux
• .NET Runtime: 8.0

Details

The Python my app calls has a number of dependencies. For predictability, I want to bundle the dependencies with my app, rather than obtain them via pip at runtime. I gathered the entire dependency tree, as well as the .py file with the code I plan to directly call, and added it all to my Visual Studio project, using build action "Content" and CopyToOutputDirectory=PreserveNewest for each item.

If I didn't need these dependencies, I would call:

PythonEngine.Initialize();

That works great. But since I do require the dependencies, I append their root folder to PythonPath first:

var libPath = Path.Combine(Directory.GetCurrentDirectory(), "Python", "libs");
PythonEngine.PythonPath = PythonEngine.PythonPath + ";" + libPath;
PythonEngine.Initialize();

Simply appending libPath to PythonPath causes my app to crash on execution of PythonEngine.Initialize();

• If there was a crash, please include the traceback here.

Is there a recommended way to obtain the traceback? The crash causes the app to exit immediately, there is no exception caught by the debugger. I am more than happy to gather any diagnostic info needed.

I solved this problem in a very clever way. You want to include a custom path in the path so that PythonNet can find the custom Python script. Instead, you can use (sys.path.append(path)) to add a custom path to it.