More accurate default sys.path.

Author: twastvedt

DSPythonNet3/DSPythonNet3Evaluator.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections;
+using System.Diagnostics;
 using System.Reflection;
 using Autodesk.DesignScript.Runtime;
 using DSPythonNet3.Encoders;
@@ -250,7 +251,13 @@ public override object Evaluate(
             {
                 PythonEngine.Initialize();
                 PythonEngine.BeginAllowThreads();
-                
+
+                using (Py.GIL())
+                using (PyModule scope = Py.CreateScope())
+                {
+                    scope.Exec("import sys" + Environment.NewLine + "path = str(sys.path)");
+                    path = scope.Get<string>("path");
+                }
             }
                 using (Py.GIL())
                 {
@@ -261,8 +268,8 @@ public override object Evaluate(
 
                     using (PyModule scope = Py.CreateScope())
                     {
-                        // Reset the 'sys.path' value to the default python paths on node evaluation. 
-                        var pythonNodeSetupCode = "import sys" + Environment.NewLine + "sys.path = sys.path[0:3]";
+                        // Reset the 'sys.path' value to the default python paths on node evaluation. See https://github.com/DynamoDS/Dynamo/pull/10977. 
+                        var pythonNodeSetupCode = "import sys" + Environment.NewLine + $"sys.path = {path}";
                         scope.Exec(pythonNodeSetupCode);
 
                         ProcessAdditionalBindings(scope, bindingNames, bindingValues);
@@ -663,6 +670,7 @@ private static bool IsMarkedToSkipConversion(PyObject pyObj)
 
         private DataMarshaler inputMarshaler;
         private DataMarshaler outputMarshaler;
+        private string path;
 
         #endregion
 

DSpythonNet3Tests/PythonLibraryTests.cs

@@ -10,11 +10,11 @@ public void TestSciPyAvailable()
         {
             string code = @"
 from scipy import special
-OUT = special.exp10(3)
+OUT = special.round(3.3333333)
 ";
             var empty = new ArrayList();
             var result = DSPythonNet3Evaluator.EvaluatePythonScript(code, empty, empty);
-            Assert.That(result, Is.EqualTo(1000));
+            Assert.That(result, Is.EqualTo(3.0));
         }
 
         [Test]
@@ -107,15 +107,10 @@ import kiwisolver as kiwi
         public void TestMatplotlibAvailable()
         {
             string code = @"
-import sys 
-OUT = sys.version
-import unicodedata2
-#print(unicodedata.name('A'))
+import matplotlib as mpl
 
-#import matplotlib as mpl
-
-#cmap = mpl.colormaps['plasma']
-#OUT = cmap.name
+cmap = mpl.colormaps['plasma']
+OUT = cmap.name
 ";
             var empty = new ArrayList();
             var result = DSPythonNet3Evaluator.EvaluatePythonScript(code, empty, empty);
@@ -175,7 +170,7 @@ public void TestPandasAvailable()
 import pandas as pd
 
 ser = pd.Series(range(5), index=list('abcde'))
-OUT = ser['d']
+OUT = ser['d'].item()
 ";
             var empty = new ArrayList();
             var result = DSPythonNet3Evaluator.EvaluatePythonScript(code, empty, empty);