●Change8

v2.5.2

Breaking Changes
📦 numpyView on GitHub →
⚠ 1 breaking✨ 1 features🐛 22 fixes🔧 6 symbols

Summary

NumPy 2.5.2 is a patch release fixing bugs and including wheels for Python 3.15.0rc1. A notable C API change makes `PyArray_StringDTypeObject` opaque under the abi3t stable ABI.

⚠️ Breaking Changes

  • The `PyArray_StringDTypeObject` is now an opaque struct when targeting the free-threading-compatible stable ABI (Py_TARGET_ABI3T). Extensions compiled with this ABI that accessed fields of `PyArray_StringDTypeObject` will crash. To fix this, use the `NpyString` allocator API by passing the descriptor object pointer, e.g., `NpyString_acquire_allocator((PyArray_StringDTypeObject *)descr)`.

Migration Steps

  1. If you are using the stable ABI (Py_TARGET_ABI3T) and accessing fields of `PyArray_StringDTypeObject`, update your code to use the `NpyString` allocator API by passing the descriptor object pointer, e.g., `NpyString_acquire_allocator((PyArray_StringDTypeObject *)descr)`.

✨ New Features

  • Wheels for Python 3.15.0rc1 are now included.

🐛 Bug Fixes

  • Fixed `StringDType` coerce flag in binary ufunc promotion.
  • Fixed meson deprecation warnings.
  • Removed obsolete string to bool workarounds.
  • Centralized helper for output coerce and na_object in stringdtype.
  • Fixed CPU feature env diagnostic buffer overruns.
  • Restored `ndarray.conjugate()` for legacy user-defined dtypes.
  • Fixed refcount leak on overlapping copyto with where=False.
  • Fixed swallowed cast error in fancy indexing assignment.
  • Fixed buffered iterator stride after removing multi-index.
  • Fixed `np.fromiter` corruption when reusing a `StringDType`.
  • Added a special case for `StringDType` in `np.isdtype`.
  • Fixed reference leak in `simd_sequence_from_iterable`.
  • Ensured lock is held when accessing or writing to RNG state.
  • Fully reset cached RNG state for non-MT19937 RNGs.
  • Avoided possible stack overflow in `arraydescr_dealloc`.
  • Fixed `isclose` shape-typing for 2d array-likes.
  • Avoided segfaults when legacy copyswap slot is not defined.
  • Fixed crash on 32-bit systems using abi3t.
  • Backported multiple static typing fixes.
  • Backported multiple typing fixes.
  • Avoided shadowed dtype annotations.
  • Fixed `StringDType` coerce flag in binary ufunc promotion.

Affected Symbols

`PyArray_StringDTypeObject``NpyString``ndarray.conjugate()``np.isdtype``np.fromiter``isclose`