bump dopt.SharpPython to v0.4.4, enable lookup of missing runtime DLL deps in root folder of Python installation

dopt.TOM/Plugin.cs

@@ -13,15 +13,27 @@ namespace dopt.TOM
         internal const string langMainStopSearchFolderName = "python";
         internal const string doptTOMPluginLibraryUsage = "1";
         protected dynamic tomWrapperPipelines;
-        public Plugin(string runtimePath) : base(SharpPython.PyOptimLevels.O, threaded: false, runtimePath: runtimePath, verbose: true) 
+        public Plugin(string runtimePath = "") : base(SharpPython.PyOptimLevels.O, threaded: false, runtimePath: runtimePath, verbose: true) 
         {
+            // keep these env variables within C#, but set them again in Python to mitigate issues in propagation from C# to Python
+            Environment.SetEnvironmentVariable("LANG_MAIN_BASE_FOLDERNAME", langMainBaseFolderName, EnvironmentVariableTarget.Process);
+            Environment.SetEnvironmentVariable("LANG_MAIN_STOP_SEARCH_FOLDERNAME", langMainStopSearchFolderName, EnvironmentVariableTarget.Process);
+            Environment.SetEnvironmentVariable("DOPT_TOM_PLUGIN_LIBRARY_USAGE", doptTOMPluginLibraryUsage, EnvironmentVariableTarget.Process);
+            
             base.Initialise();
+            
             using (Py.GIL())
             {
                 dynamic os = Py.Import("os");
-                os.putenv("LANG_MAIN_BASE_FOLDERNAME", langMainBaseFolderName);
-                os.putenv("LANG_MAIN_STOP_SEARCH_FOLDERNAME", langMainStopSearchFolderName);
-                os.putenv("DOPT_TOM_PLUGIN_LIBRARY_USAGE", doptTOMPluginLibraryUsage);
+                // set environment variables directly in Python
+                using (PyDict kwargs = new PyDict())
+                {
+                    kwargs.SetItem("LANG_MAIN_BASE_FOLDERNAME", new PyString("bin"));
+                    kwargs.SetItem("LANG_MAIN_STOP_SEARCH_FOLDERNAME", new PyString("python"));
+                    kwargs.SetItem("DOPT_TOM_PLUGIN_LIBRARY_USAGE", new PyString("1"));
+                    // Call function with no positional arguments, only keyword arguments
+                    os.environ.update.Invoke(new PyTuple(), kwargs);
+                }
                 tomWrapperPipelines = Py.Import("tom_plugin.pipeline");
             }
         }

dopt.TOM/dopt.TOM.csproj

@@ -3,12 +3,12 @@
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <PlatformTarget>x64</PlatformTarget>
-    <Version>0.1.2</Version>
+    <Version>0.1.4</Version>
     <Platforms>x64</Platforms>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="dopt.SharpPython" Version="0.4.3" />
+    <PackageReference Include="dopt.SharpPython" Version="0.4.4" />
   </ItemGroup>
 
 </Project>

dopt.TOMTests/Tests.cs

@@ -4,7 +4,7 @@
     [TestClass]
     public sealed class PluginTests
     {
-        public const string rtPath = @"A:\Arbeitsaufgaben\MOP-TOM\tom-plugin-deploy\bin";
+        public const string rtPath = @"A:\Arbeitsaufgaben\MOP-TOM\deployment\integration-test\bin";
         public const string dummyData = @"Dummy_Dataset_N_1000.csv";
         [TestMethod]
         public void RunPipelineOnTestData()