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[pull] master from pythonnet:master by pull[bot] · Pull Request #54 · QSLee-Net/pythonnet · GitHub

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11 changes: 11 additions & 0 deletions CHANGELOG.md
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,15 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].

### Added

### Changed

### Fixed


## 3.2.0 - 2026-09-29

### Added

- Support for Python 3.15 (#2729)
- Support for free-threaded Python 3.14 (`Py_GIL_DISABLED`) (#2721)
- Threading documentation covering GIL ownership, managed threads, and
Expand All @@ -28,6 +37,8 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
- Fix method binding initialization when methods are first accessed (#2721)
- Fix wheel and NuGet preview package builds
- Python exception raised on conversion failure (#2741)
- Introduce additional pre-checks in `PyBuffer_GetPointer` to prevent memory
corruption (#2745)

## 3.1.0 - 2026-05-23

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47 changes: 43 additions & 4 deletions src/embed_tests/TestPyBuffer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,14 @@
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading;

using NUnit.Framework;

using Python.Runtime;
using Python.Runtime.Codecs;

namespace Python.EmbeddingTest {
namespace Python.EmbeddingTest
{
class TestPyBuffer
{
[OneTimeSetUp]
Expand Down Expand Up @@ -58,13 +61,49 @@ public void TestBufferRead()
}

string result = new UTF8Encoding().GetString(managedArray);
Assert.That(result == " " + bufferTestString.Substring(1), Is.True);
Assert.That(result, Is.EqualTo($" {bufferTestString.Substring(1)}"));
}

[Test]
public void GetPointer()
{
// create 3D NumPy array
int[] shape = [10, 10, 10];
using PyObject ndArray = np.zeros(shape);

using PyBuffer buf = ndArray.GetBuffer(PyBUF.STRIDES);

var ptr = buf.GetPointer([0, 0, 0]);

Assert.That(ptr, Is.Not.EqualTo(IntPtr.Zero));

var ptrEnd = buf.GetPointer([9, 9, 9]);
Assert.That(ptrEnd, Is.Not.EqualTo(IntPtr.Zero));

Assert.Throws<ArgumentNullException>(() => buf.GetPointer(null!));

Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([0, 0]));
Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([0, 0, 0, 0]));

Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([-1, 0, 0]));
Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([0, -1, 0]));
Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([0, 0, -1]));

Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([10, 0, 0]));
Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([0, 10, 0]));
Assert.Throws<ArgumentOutOfRangeException>(() => buf.GetPointer([0, 0, 10]));

using PyBuffer buf2 = ndArray.GetBuffer(PyBUF.ND);

Assert.Throws<InvalidOperationException>(
() => buf2.GetPointer([0, 0, 0])
);
}

[Test]
public void ArrayHasBuffer()
{
var array = new[,] {{1, 2}, {3,4}};
var array = new[,] { { 1, 2 }, { 3, 4 } };
var memoryView = PythonEngine.Eval("memoryview");
var mem = memoryView.Invoke(array.ToPython());
Assert.That(mem[(0, 0).ToPython()].As<int>(), Is.EqualTo(1));
Expand Down Expand Up @@ -113,7 +152,7 @@ public void Finalization()
[Test]
public void MultidimensionalNumPyArray()
{
var ndarray = np.arange(24).reshape(1,2,3,4).T;
var ndarray = np.arange(24).reshape(1, 2, 3, 4).T;
PyObject ndim = ndarray.ndim;
PyObject shape = ndarray.shape;
PyObject strides = ndarray.strides;
Expand Down
29 changes: 28 additions & 1 deletion src/runtime/PythonTypes/PyBuffer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -110,10 +110,37 @@ public bool IsContiguous(BufferOrderStyle order)
/// </summary>
public IntPtr GetPointer(long[] indices)
{
if (indices is null) throw new ArgumentNullException(nameof(indices));
if (indices is null)
throw new ArgumentNullException(nameof(indices));

if (Strides is null)
throw new InvalidOperationException($"{nameof(GetPointer)} requires {nameof(Strides)} to be filled");

if (indices.Length != Dimensions)
throw new ArgumentOutOfRangeException($"{nameof(indices)} must be exactly {Dimensions} long");

if (Dimensions == 0 && Shape is null)
throw new InvalidOperationException($"{nameof(GetPointer)} requires {nameof(Shape)} to be filled for dimensional buffers");

ThrowIfDisposed();

if (Runtime.PyVersion < new Version(3, 7))
throw new NotSupportedException("GetPointer requires at least Python 3.7");

var indicesArr = new nint[Dimensions];

for (var i = 0; i < Dimensions; i++)
{
indicesArr[i] = checked((nint)indices[i]);

if (indicesArr[i] < 0 || indicesArr[i] >= Shape![i])
{
throw new ArgumentOutOfRangeException(
$"Index {i} has a value of {indicesArr[i]} not in [0, {Shape![i]})"
);
}
}

return Runtime.PyBuffer_GetPointer(ref _view, indices.Select(x => checked((nint)x)).ToArray());
}

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2 changes: 1 addition & 1 deletion version.txt
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Original file line number Diff line number Diff line change
@@ -1 +1 @@
3.2.0-rc2
3.3.0-dev
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