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[Cherry-pick] DYN-8088 DSCore.List.Flatten does not work in PythonNet3 #16805

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[Cherry-pick] DYN-8088 DSCore.List.Flatten does not work in PythonNet3 #16805

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94ac786
DYN-8088 DSCore.List.Flatten does not work in PythonNet3 (#16761)
ivaylo-matov Dec 18, 2025
badda15
Update PythonMigrationViewExtension.csproj
reddyashish Dec 23, 2025
4d84b43
Update PythonMigrationViewExtension.csproj
reddyashish Dec 23, 2025
d02f5f3
Update PythonTestsWithLogging.cs
reddyashish Dec 23, 2025
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2 changes: 1 addition & 1 deletion src/DynamoCore/DynamoCore.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,7 @@
<PackageReference Include="Lucene.Net" Version="4.8.0-beta00016" />
<PackageReference Include="Lucene.Net.Analysis.Common" Version="4.8.0-beta00016" />
<PackageReference Include="Lucene.Net.QueryParser" Version="4.8.0-beta00016" />
<PackageReference Include="DynamoVisualProgramming.PythonEngine.PythonNet3" Version="1.4.5" GeneratePathProperty="true" ExcludeAssets="all" />
<PackageReference Include="DynamoVisualProgramming.PythonEngine.PythonNet3" Version="1.4.7" GeneratePathProperty="true" ExcludeAssets="all" />
<PackageReference Include="DynamoVisualProgramming.Analytics" Version="4.2.3.10496" />
</ItemGroup>
<ItemGroup>
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2 changes: 1 addition & 1 deletion src/PythonMigrationViewExtension/PythonMigrationViewExtension.csproj
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Expand Up @@ -15,7 +15,7 @@
</PropertyGroup>
<ItemGroup>
<PackageReference Include="DiffPlex" Version="1.6.3" CopyMetaData="true" />
<PackageReference Include="DynamoVisualProgramming.PythonEngine.PythonNet3" Version="1.4.5">
<PackageReference Include="DynamoVisualProgramming.PythonEngine.PythonNet3" Version="1.4.7">
<ExcludeAssets>runtime;native;contentFiles;build;buildTransitive;analyzers</ExcludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
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2 changes: 1 addition & 1 deletion test/Libraries/DynamoPythonTests/DynamoPythonTests.csproj
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Expand Up @@ -22,7 +22,7 @@
<PackageReference Include="DynamicLanguageRuntime" Version="1.2.2" />
<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
<PackageReference Include="DynamoVisualProgramming.PythonEngine.PythonNet3" Version="1.4.5">
<PackageReference Include="DynamoVisualProgramming.PythonEngine.PythonNet3" Version="1.4.7">
<ExcludeAssets>runtime;native;contentFiles;build;buildTransitive;analyzers</ExcludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
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53 changes: 46 additions & 7 deletions test/Libraries/DynamoPythonTests/PythonEvalTestsWithLibraries.cs
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Expand Up @@ -44,14 +44,7 @@ from FFITarget import DummyMath
}
}

/// <summary>
/// PythonNet3 vs DesignScript list interop issue:
/// DSCore list ops expect DS lists; PythonNet passes .NET lists, causing wrong overloads/comparers.
/// Quarantined until parity fix.
/// </summary>
[Test]
[Category("Failure")]
[Category("TechDebt")]
public void TestListDecoding()
{
string code = @"
Expand Down Expand Up @@ -344,6 +337,52 @@ import DSCore
}
}

[Test]
public void TryDecode_ConvertsNestedPythonListsToClrLists()
{
string code = @"
import clr
clr.AddReference('DSCoreNodes')
from DSCore import List

data = [[[1, 2], [3]], [[4, 5], [6]]]
OUT = data, List.Flatten(data, 1), List.Flatten(data, 2), List.Flatten(data)
";
var emptyInputs = new ArrayList();
var expected = new ArrayList
{
new ArrayList
{
new ArrayList
{
new ArrayList { 1, 2 },
new ArrayList { 3 }
},
new ArrayList
{
new ArrayList { 4, 5 },
new ArrayList { 6 }
}
},
new ArrayList
{
new ArrayList { 1, 2 },
new ArrayList { 3 },
new ArrayList { 4, 5 },
new ArrayList { 6 }
},
new ArrayList { 1, 2, 3, 4, 5, 6 },
new ArrayList { 1, 2, 3, 4, 5, 6 }
};

foreach (var pythonEvaluator in Evaluators)
{
var result = pythonEvaluator(code, emptyInputs, emptyInputs);
Assert.That(result, Is.InstanceOf<IEnumerable>());
CollectionAssert.AreEqual(expected, result as IEnumerable);
}
}

private void DictionaryAssert(IDictionary expected, IDictionary actual)
{
Assert.AreEqual(expected.Count, actual.Count);
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