Version 2.8.2

New features

• feat: add segmented argmin and argmax by @ianna in #3449
• feat: change argmin and argmax algorithms to handle big data by @ianna in #3450
• feat: implement segment count_nonzero reducer by @ianna in #3452
• feat: support unknown_length for virtual arrays in order to read without any materialization by @ikrommyd in #3475
• feat: enable jax backend for virtual arrays by @ikrommyd in #3451
• feat: Add a parquet uuid calculation by @NJManganelli in #3440

Bug-fixes and performance

• fix: typo in UnionArray combinations by @ikrommyd in #3438
• fix: pyarrow 19.0 support by @ianna in #3416
• fix: force gc in numba test by @ianna in #3448
• fix: highlevel function dispatch type hint by @pfackeldey in #3447
• fix: remove mixed numpy<->jax arrays in Jax backend by @pfackeldey in #3446
• fix: better support for pyright by @henryiii in #3453
• fix: setitem in ak firsts with jax backend by @pfackeldey in #3455
• fix: replace some __setitem__ calls with .at[where].set(value) for the jax backend by @ikrommyd in #3457
• fix: remove duplicate failing raggedtensor test when you have a GPU on the system by @ikrommyd in #3461
• fix: single int slicing for named axis by @pfackeldey in #3469
• fix: add ptr implementation and fix __setitem__ for Index and tocarryraw to make ak.(arg)combinations work for the jax backend by @ikrommyd in #3471
• fix: check for error being None in the output of validity kernels by @ikrommyd in #3479
• fix: minor things required for the whole ci to work with virtual arrays by @ikrommyd in #3484
• fix: jax reducers returning incorrect output values or lengths by @ikrommyd in #3464
• fix: avoid calling shape_generator inside generator if it has already been called by @ikrommyd in #3490
• fix: add field metadata to record its option type by @ianna in #3478
• fix: add maps_as_pydicts parameter to to_pylist by @ianna in #3492
• fix: consistent materializing length across all layouts by @ikrommyd in #3489

Other

• refactor: move form_with_unique_keys here by @pfackeldey in #3482
• revert: "fix: setitem in ak firsts with jax backend" by @ianna in #3460
• docs: minor fixes to JAX guide + add VJP example by @Saransh-cpp in #3439
• docs: add ikrommyd as a contributor for test by @allcontributors in #3472
• docs: add NJManganelli as a contributor for code by @allcontributors in #3481
• chore: update pre-commit hooks by @pre-commit-ci in #3436
• chore: update pre-commit hooks by @pre-commit-ci in #3443
• chore: update pre-commit hooks by @pre-commit-ci in #3445
• chore: update pre-commit hooks by @pre-commit-ci in #3470
• chore: use ubuntu-latest for coverage by @ianna in #3473
• chore: update pre-commit hooks by @pre-commit-ci in #3476
• chore: update pre-commit hooks by @pre-commit-ci in #3486
• chore: update pyarrow version in the full testing requirements by @ianna in #3487
• chore: remove the upper pin on pyarrow by @ianna in #3493
• chore(deps): bump scientific-python/upload-nightly-action from 0.6.1 to 0.6.2 in the actions group by @dependabot in #3442
• chore(deps): bump the actions group with 2 updates by @dependabot in #3485

New Contributors

• @NJManganelli made their first contribution in #3440

Full Changelog: v2.8.1...v2.8.2

Version 2.8.1

New features

• feat: add tobytes to VirtualArray by @ikrommyd in #3434

Bug-fixes and performance

(none!)

Other

(none!)

Full Changelog: v2.8.0...v2.8.1

Version 2.8.0

New features

• feat: implement virtual arrays by @ikrommyd in #3364

Bug-fixes and performance

• fix: Drop timezone in from_arrow by @martindurant in #3392
• fix: typo/bug in to_nplike by @ikrommyd in #3400
• fix: mark awkward as freedthread safe with pybind11 by @lgray in #3396
• fix: numexpr: no local_dict.clear() on Python 3.13 by @bnavigator in #3404
• fix: jax backend tracer leaks by @pfackeldey in #3405
• fix: structure removal order for unions by @pfackeldey in #3397
• fix: maintain tupleness of RecordForms when using _select_columns and _prune_columns by @ariostas in #3410
• fix: ruff linting by @ianna in #3423
• fix: ak.almost_equal and ak.array_equal should check that jagged arrays have the same offsets by @ikrommyd in #3425
• fix: cleanup ruff linter errors by @ianna in #3430
• fix: index with int in unionarray.py by @ianna in #3419
• fix: an Index's data should be passed into array_equal, not the Index itself by @ikrommyd in #3432

Other

• docs: add ak.zip_no_broadcast and ak.with/without_named_axis to public API docs by @ikrommyd in #3399
• docs: fix array_equal reference guide by @ianna in #3424
• docs: add ikrommyd as a contributor for code by @allcontributors in #3427
• chore: update pre-commit hooks by @pre-commit-ci in #3394
• chore: update pre-commit hooks by @pre-commit-ci in #3398
• chore: update pre-commit hooks by @pre-commit-ci in #3406
• chore: update pre-commit hooks by @pre-commit-ci in #3408
• chore: update ROOT test platform to ubuntu-latest by @ianna in #3409
• chore: update pre-commit hooks by @pre-commit-ci in #3415
• chore(deps): bump the actions group across 1 directory with 2 updates by @dependabot in #3411
• chore: update pre-commit hooks by @pre-commit-ci in #3417

New Contributors

• @ikrommyd made their first contribution in #3399
• @bnavigator made their first contribution in #3404

Full Changelog: v2.7.4...v2.8.0

Version 2.7.4

New features

• feat: add a non-touching ak.zip, called 'ak.zip_no_broadcast' by @pfackeldey in #3390

Bug-fixes and performance

(none!)

Other

• chore: update pre-commit hooks by @pre-commit-ci in #3389
• chore(deps): bump the actions group with 2 updates by @dependabot in #3388

Full Changelog: v2.7.3...v2.7.4

Version 2.7.3

New features

• feat: add pretty nbytes repr to .show and jupyter repr by @pfackeldey in #3348
• feat: improve error message when indexing placeholder arrays by @pfackeldey in #3353

Bug-fixes and performance

• perf: make the ak.Array.mask weakly dependent on the array itself by @pfackeldey in #3347
• perf: add caches to reduce python overhead by @pfackeldey in #3359
• fix: current failing jax tests for jax>=0.4.36 by @pfackeldey in #3340
• fix: placeholder arrays in record __repr__ by @pfackeldey in #3342
• fix: stacktraces for custom exception handling by @pfackeldey in #3343
• fix: control attrs better as described in issue #3277 by @pfackeldey in #3344
• fix: enforce string-only keys in .attrs by @pfackeldey in #3350
• fix: nbytes property of ak.Record by @pfackeldey in #3352
• fix: hash of HashableDict by @pfackeldey in #3355
• fix: datetime.datetime.utcfromtimestamp deprecation warning by @ianna in #3338
• fix: version check in to_cudf for API change by @martindurant in #3339
• fix: nbytes repr for typetracers with nbytes=unknown_length by @pfackeldey in #3361
• fix: update Chicago Taxi Dataset URL to Zenodo by @jpivarski in #3357
• fix: always check '.length' for 'unknown_length' by @jpivarski in #3332
• fix: _getitem_at_placeholder checks by @pfackeldey in #3368
• fix: resulting setitem layout type for ak.Record by @pfackeldey in #3372
• fix: change primitive_policy to allow converting Numpy arrays by @ianna in #3375
• fix: placeholder array repr with extra info by @pfackeldey in #3378
• fix: set allow_lazy to True to avoid touching potential placeholders by @pfackeldey in #3379
• fix: remove unsafe lru cache by @pfackeldey in #3384
• fix: test Pyodide with cibuildwheel and fix 32-bit issue by @henryiii in #3270

Other

• docs: add a performance tip to ak.transform docstring by @pfackeldey in #3369
• docs: add HavryliukAY as a contributor for code by @allcontributors in #3376
• refactor: propagate attrs & behavior with dict-like ak.Array input data by @pfackeldey in #3374
• refactor: simplify attrs & fix its pickability (for e.g. dask.distributed) by @pfackeldey in #3383
• ci: use native arm for wheels by @henryiii in #3381
• chore: remove WASM building in docs.yml by @jpivarski in #3333
• chore: use _util.native_to_byteorder function in ak.from_buffers by @pfackeldey in #3354
• chore: remove duplicate code by @pfackeldey in #3360
• chore: update pre-commit hooks by @pre-commit-ci in #3336
• chore(deps): bump the actions group across 1 directory with 3 updates by @dependabot in #3358
• chore: update pre-commit hooks by @pre-commit-ci in #3367
• chore(deps): bump docker/setup-qemu-action from 3.2.0 to 3.3.0 in the actions group by @dependabot in #3366
• chore: update pre-commit hooks by @pre-commit-ci in #3377
• chore: native Apple Silicon wheels by @henryiii in #3382
• chore: check if 32bit right broadcasting test pass again by @pfackeldey in #3386
• chore: reducing warnings by @henryiii in #3387
• chore: minor cleanup by @henryiii in #3385

Full Changelog: v2.7.2...v2.7.3

Version 2.7.2

This is the first version built with MacOS 13 instead of MacOS 12.

New features

• feat: Content.form_with_key_path() by @jpivarski in #3311
• feat: allow np.arrays in ak.full_like as fill_value by @pfackeldey in #3315

Bug-fixes and performance

• fix: sorting of record arrays without fields (ak.zip(tuple(...))) by @pfackeldey in #3314
• fix: concatenation of empty records by @pfackeldey in #3316
• fix: extend limit on number of regular arrays to concatenate by @ianna in #3312
• fix: typetracer lengths for optiontypes in 'ak.where' broadcastings by @pfackeldey in #3322
• fix: handle type tracer correctly in indexed option array flattening by @lgray in #3325
• fix: Upstream API changes in cuDF 24.10 by @jpivarski in #3328 (but actually by @martindurant; see #3309)

Other

• chore: update pre-commit hooks by @pre-commit-ci in #3319
• chore(deps): bump the actions group with 2 updates by @dependabot in #3318
• chore: upgrade macos-12 -> macos-13 by @jpivarski in #3327
• chore: update pre-commit hooks by @pre-commit-ci in #3323

Full Changelog: v2.7.1...v2.7.2

Version 2.7.1

New features

(none!)

Bug-fixes and performance

• fix: test from_raggedtensor on CUDA by @ianna in #3298
• fix: use None when ndims can't be inferred from a layout-like obj by @pfackeldey in #3299
• fix: ak.argcombinations should allow negative axis by @jpivarski in #3301
• fix: restrict named_axis inferring to ak.Arrays/ak.Records/ak.HighLevelContexts by default by @pfackeldey in #3304

Other

• chore: update pre-commit hooks by @pre-commit-ci in #3303
• chore: update pre-commit hooks by @pre-commit-ci in #3307
• chore(deps): bump the actions group across 1 directory with 3 updates by @dependabot in #3306

Full Changelog: v2.7.0...v2.7.1

Version 2.7.0

This release drops support for Python 3.8. The supported Python versions are now 3.9 through 3.13 (inclusive). Other than that, it does not differ from 2.6.10.

New features

(none!)

Bug-fixes and performance

(none!)

Other

• chore: remove Python 3.8, ensure Python 3.13 is included by @jpivarski in #3295

Full Changelog: v2.6.10...v2.7.0

Version 2.6.10

New features

• feat: named axis for ak.Array by @pfackeldey in #3238
• feat: to/from TensorFlow Tensor by @maxymnaumchyk in #3292
• feat: updated LayoutBuilder.h (added functors) for C++11 compatibility by @jpivarski in #3281

Bug-fixes and performance

• fix: make sure 'at' is a cupy zero dim array by @ianna in #3271
• fix: add cuda backend support for to_raggedtensor and from_raggedtensor functions by @maxymnaumchyk in #3263
• fix: test from_raggedtensor on GPU by @ianna in #3288
• fix: correct handling of keepdims and mask_identity for weighted mean by @nj-vs-vh in #3291

Other

• docs: add tacaswell as a contributor for maintenance by @allcontributors in #3273
• docs: add basnijholt as a contributor for maintenance by @allcontributors in #3287
• docs: add nj-vs-vh as a contributor for code by @allcontributors in #3293
• chore: update pre-commit hooks by @pre-commit-ci in #3275
• chore: delete .DS_Store and add it to .gitignore by @basnijholt in #3286
• chore(deps): bump the actions group across 1 directory with 2 updates by @dependabot in #3290
• test: add simple slice test to cuda by @martindurant in #3242
• chore: update pre-commit hooks by @pre-commit-ci in #3284
• chore: increase try-it version of Awkward to 2.6.4 by @jpivarski in #3279

New Contributors

• @basnijholt made their first contribution in #3286
• @nj-vs-vh made their first contribution in #3291

Full Changelog: v2.6.9...v2.6.10

Version 2.6.9

New features

• feat: Add to_cudf by @martindurant in #3051
• feat: to/from PyTorch Tensor by @maxymnaumchyk in #3259

Bug-fixes and performance

• perf: avoid inflating UnmaskedArrays in broadcasting when you can by @jpivarski in #3254
• fix: TypeError fix for can_cast by @ianna in #3255
• fix: ListArray slicing on GPU by @ianna in #3248
• fix: ak.typetracer.length_one_if_typetracer with option and union types by @jpivarski in #3266

Other

• docs: add ariostas as a contributor for code by @allcontributors in #3240
• docs: add maxymnaumchyk as a contributor for code by @allcontributors in #3241
• docs: pybind11 demo project should have NumPy own the data by @jpivarski in #3261
• ci: use official GHA for uv by @henryiii in #3269
• ci: restore Windows 32-bit wheels by @henryiii in #3268
• chore: update RapidJSON by @tacaswell in #3249
• chore: update affiliation in CITATION.cff by @ManasviGoyal in #3251
• chore(deps): bump the actions group across 1 directory with 3 updates by @dependabot in #3260
• chore: update pre-commit hooks by @pre-commit-ci in #3245

New Contributors

• @tacaswell made their first contribution in #3249

Full Changelog: v2.6.8...v2.6.9