C#基于pythonnet调用Python的pyd文件，实现交互

 private void TestPython()
 {
     try
     {
         //python环境路径
         string pathToVirtualEnv = @"H:\ProgramData\anaconda3\envs\python39";
         Environment.SetEnvironmentVariable("PATH", pathToVirtualEnv, EnvironmentVariableTarget.Process);
         Environment.SetEnvironmentVariable("PYTHONHOME", pathToVirtualEnv, EnvironmentVariableTarget.Process);
         Environment.SetEnvironmentVariable("PYTHONPATH", pathToVirtualEnv + "\\Lib\\site-packages;" + pathToVirtualEnv + "\\Lib", EnvironmentVariableTarget.Process);

         PythonEngine.PythonHome = pathToVirtualEnv;
         PythonEngine.PythonPath = PythonEngine.PythonPath + ";" + Environment.GetEnvironmentVariable("PYTHONPATH", EnvironmentVariableTarget.Process);
         PythonEngine.Initialize();
         PythonEngine.BeginAllowThreads();
         using (Py.GIL()) // 使用这个来包裹你调用python方法的代码
         {
             // 先引入python模块，也就是我们上面生成的pyd文件，如Test.cp39-win_amd64.pyd
             dynamic my_module = Py.Import("Test");
             // Call your python functions.
             int value = my_module.ShowNum();
             Debug.Write("[Debug]:" + value +"\t\n");
         }
     }
     catch (Exception ex)
     {
         Debug.WriteLine("[ERROR]:" + ex.Message + "\t\n");
     }
 }

注意:pythonnetd 版本与Python的版本需要一致