Convert BigInteger to Int64 when possible from Python

src/DynamoUtilities/DataMarshaler.cs

@@ -2,6 +2,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
+using System.Numerics;
 
 namespace Dynamo.Utilities
 {
@@ -25,6 +26,20 @@ public DataMarshaler()
                     // Dictionary<TKey, TValue> and IronPython.Runtime.PythonDictionary both implement IDictionary
                     return dict.Keys.Cast<object>().ToDictionary(key => Marshal(key), key => Marshal(dict[key]));
                 });
+            RegisterMarshaler(
+                (BigInteger bigInt) =>
+                {
+                    long int64;
+                    try
+                    {
+                        int64 = (long)bigInt;
+                    }
+                    catch (OverflowException)
+                    {
+                        return bigInt;
+                    }
+                    return int64;
+                });
         }
 
         /// <summary>
@@ -86,7 +101,9 @@ public object Marshal(object obj)
             var applicable = marshalers.Where(pair => pair.Key.IsAssignableFrom(targetType));
 
             if (!applicable.Any())
+            {
                 return obj;
+            }
 
             // Find the marshaler that operates on the closest base type of the target type.
             var dispatchedMarshaler =

src/DynamoUtilities/DynamoUtilities.csproj

@@ -49,6 +49,7 @@
     <Reference Include="System" />
     <Reference Include="System.configuration" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Numerics" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />

test/Libraries/DynamoPythonTests/PythonEditTests.cs

@@ -15,6 +15,7 @@ public class PythonEditTests : DynamoViewModelUnitTest
         protected override void GetLibrariesToPreload(List<string> libraries)
         {
             libraries.Add("DesignScriptBuiltin.dll");
+            libraries.Add("DSCoreNodes.dll");
             libraries.Add("DSIronPython.dll");
             base.GetLibrariesToPreload(libraries);
         }
@@ -212,5 +213,18 @@ private void UpdatePythonNodeContent(ModelBase pythonNode, string value)
 
             ViewModel.ExecuteCommand(command);
         }
+
+        [Test]
+        public void BigInteger_CanBeMarshaledAsInt64()
+        {
+            // open test graph
+            var examplePath = Path.Combine(TestDirectory, @"core\python", "BigIntegerToLong.dyn");
+            ViewModel.OpenCommand.Execute(examplePath);
+
+            var guid = "23088248d7b1441abbc5ada07fcdf154";
+
+            AssertPreviewValue(guid,
+                new[] {"System.Int64", "System.Double", "System.Int64", "System.Int64", "System.Numerics.BigInteger"});
+        }
     }
 }

test/Libraries/DynamoPythonTests/PythonEvalTests.cs

@@ -103,5 +103,5 @@ public void SliceOperator_Output()
 
             Assert.AreEqual(expected, output);
         }
-}
+    }
 }

test/core/python/BigIntegerToLong.dyn

@@ -0,0 +1,132 @@
+{
+  "Uuid": "13bd6959-7de4-49d4-98c9-fe6c75aced8c",
+  "IsCustomNode": false,
+  "Description": null,
+  "Name": "BigIntegerToLong",
+  "ElementResolver": {
+    "ResolutionMap": {}
+  },
+  "Inputs": [],
+  "Outputs": [],
+  "Nodes": [
+    {
+      "ConcreteType": "PythonNodeModels.PythonNode, PythonNodeModels",
+      "NodeType": "PythonScriptNode",
+      "Code": "# Load the Python Standard and DesignScript Libraries\r\nimport sys\r\nimport clr\r\n\r\n# The inputs to this node will be stored as a list in the IN variables.\r\ndataEnteringNode = IN\r\n\r\n# Place your code below this line\r\n\r\n# Assign your output to the OUT variable.\r\nOUT = [2059130726864, 2*10e13, int(2*10e13), -9223372036854775808, 9223372036854775808]",
+      "VariableInputPorts": true,
+      "Id": "547d1dd9203746bbaa2b7bd448c8124a",
+      "Inputs": [
+        {
+          "Id": "f39b2d33b15a4634b8c24228f2e985b3",
+          "Name": "IN[0]",
+          "Description": "Input #0",
+          "UsingDefaultValue": false,
+          "Level": 2,
+          "UseLevels": false,
+          "KeepListStructure": false
+        }
+      ],
+      "Outputs": [
+        {
+          "Id": "20ae72e54022449fb5547939aa05cbd2",
+          "Name": "OUT",
+          "Description": "Result of the python script",
+          "UsingDefaultValue": false,
+          "Level": 2,
+          "UseLevels": false,
+          "KeepListStructure": false
+        }
+      ],
+      "Replication": "Disabled",
+      "Description": "Runs an embedded IronPython script."
+    },
+    {
+      "ConcreteType": "Dynamo.Graph.Nodes.ZeroTouch.DSFunction, DynamoCore",
+      "NodeType": "FunctionNode",
+      "FunctionSignature": "DSCore.Object.Type@var",
+      "Id": "23088248d7b1441abbc5ada07fcdf154",
+      "Inputs": [
+        {
+          "Id": "4fc5a9ec1dac43c298f2fb819b6c0c44",
+          "Name": "obj",
+          "Description": "An object.\n\nvar",
+          "UsingDefaultValue": false,
+          "Level": 2,
+          "UseLevels": false,
+          "KeepListStructure": false
+        }
+      ],
+      "Outputs": [
+        {
+          "Id": "ea6928c8a2814de193d882a42613ba21",
+          "Name": "string",
+          "Description": "Type of object.",
+          "UsingDefaultValue": false,
+          "Level": 2,
+          "UseLevels": false,
+          "KeepListStructure": false
+        }
+      ],
+      "Replication": "Auto",
+      "Description": "Returns the type of object represented as string.\n\nObject.Type (obj: var): string"
+    }
+  ],
+  "Connectors": [
+    {
+      "Start": "20ae72e54022449fb5547939aa05cbd2",
+      "End": "4fc5a9ec1dac43c298f2fb819b6c0c44",
+      "Id": "49b834023f51443b81132f6231bb8a52"
+    }
+  ],
+  "Dependencies": [],
+  "NodeLibraryDependencies": [],
+  "Bindings": [],
+  "View": {
+    "Dynamo": {
+      "ScaleFactor": 1.0,
+      "HasRunWithoutCrash": true,
+      "IsVisibleInDynamoLibrary": true,
+      "Version": "2.5.0.6757",
+      "RunType": "Automatic",
+      "RunPeriod": "1000"
+    },
+    "Camera": {
+      "Name": "Background Preview",
+      "EyeX": -17.0,
+      "EyeY": 24.0,
+      "EyeZ": 50.0,
+      "LookX": 12.0,
+      "LookY": -13.0,
+      "LookZ": -58.0,
+      "UpX": 0.0,
+      "UpY": 1.0,
+      "UpZ": 0.0
+    },
+    "NodeViews": [
+      {
+        "ShowGeometry": true,
+        "Name": "Python Script",
+        "Id": "547d1dd9203746bbaa2b7bd448c8124a",
+        "IsSetAsInput": false,
+        "IsSetAsOutput": false,
+        "Excluded": false,
+        "X": 201.0,
+        "Y": 293.0
+      },
+      {
+        "ShowGeometry": true,
+        "Name": "Object.Type",
+        "Id": "23088248d7b1441abbc5ada07fcdf154",
+        "IsSetAsInput": false,
+        "IsSetAsOutput": false,
+        "Excluded": false,
+        "X": 436.0,
+        "Y": 367.0
+      }
+    ],
+    "Annotations": [],
+    "X": 0.0,
+    "Y": 0.0,
+    "Zoom": 1.0
+  }
+}