Version 1.5.0

Features

• Support variable rebinning #913
• Removed support for Python 3.7 #952
• Added support for Python 3.13 and free-threaded Python 3.13t #950
• Add GitHub artifact attestations to package distribution #933

Backend and docs

• Move build to scikit-build-core #887
• Clean up sdist files #928
• Minor touchup to build backend, use scikit-build-core 0.10+ #948

CI and testing

• Try cibuildwheel pyodide #935
• Try to fix pyodide build #934
• Update emscripten build #937
• Bump to Pyodide 3.12 #938
• Speed up pyodide job by a few seconds #941
• Update jobs and noxfile #929
• Use pylint 3.2 github formatter instead #932
• Add some CI speedups #939
• Faster cibuildwheel #942
• Adapt to final release of NumPy 2.1.0 #951

Full Changelog: v1.4.1...v1.5.0

Version 1.4.1

Features

• NumPy 2 support. #918
• 32-bit Windows Python 3.12 wheel added (matching NumPy). #920

Bugfixes

• Support filling Integer axes with unsigned integers #917
• Avoid triggering NumPy 2 dev release install on Python 3.12. #914

Backend and docs

• Add missing API docs #909
• Use boost 1.84 #920

New Contributors

• @Saransh-cpp made their first contribution in #909
• @veprbl made their first contribution in #917

Full Changelog: v1.4.0...v1.4.1

Version 1.4.0

This release supports Python 3.7-3.12. You can now turn off the flow bin on Int/Str Categories, and filling an integer-based axis requires an integer array - a floating point array is disallowed (a single float was always disallowed), due to issues with rounding around 0.

Features

• overflow=False is now supported for IntCategory and StrCategory. #883

Changes

• Using _storage_type now produces a DeprecationWarning instead of PendingDeprecationWarning. #801
• Updated Boost to 1.82. The upper limit on Regular axes without overflow is now inclusive like NumPy. #802
• Produce more detailed error messages on C++ errors #848

Bugfixes

• Make filling an integer axis with a float array (also) an error. #876
• Include -latomic on armv7l #823

Backend and docs

• Add Python 3.12 support and binary wheels, also latest PyPy. manylinux2014+ required. #880, #878
• Drop Python 3.6 support. #798
• Drop pre-built wheels for 32-bit Linux (NumPy also dropped). #849
• Add testing for WebAssembly (Pyodide). #850
• Use Ruff #829

New Contributors

• @matthewfeickert made their first contribution in #823

Full Changelog: v1.3.2...v1.4.0

Version 1.3.2

1.3 is the final release series supporting Python 3.6 and manylinux1 - manylinux2010. The next release will move to non EoL Python and manylinux images only.

Changes

• Added storage_type() as public API #781, with pending deprecation for _storage_type. #786 #790
• Better errors generated for missing or incorrect sample to mean storage. #782
• Better error message when views are set with an incompatible array. #794

Bug fixes

• Patch broken sum with fully empty (0 bin) axis. #718
• Fix zero range bh.numpy.histogram to match numpy.histogram behavior. #721
• Avoid triggering __init__ when copying (better support for subclasses with custom init's). #759
• IntCategory now supports numbers larger than 2²⁴ (now 2⁵³). #792
• Pick a subset now supported inside a larger expression. #793

Backend and docs

• Minor optimizations for UFuncs. #771
• Added Python 3.11 wheels. #789
• Include PyPy 3.9 binary wheels. #730
• Using pybind11 2.10 #767
• Explicit reset() documentation. #783
• Minor cleanup and further removal of a little Python 2 back-compat code.
• Warnings have better stacklevel settings.

Version 1.3.1

Bug fixes

• Fixed regression with invalid .project input causing segfaults. #708
• Minor skips for specific tests on ppc64le, primarily for a NumPy bug. #707
• Avoid using EH for program control, better on Pyodide. #709
• Fix regression with exact float not being accepted for .index for IntCategory
  in 1.3.0. Add hist nox session to check downstream (manually for the
  moment). #710

Version 1.3.0

User changes

• PyPy 3.8 now supported with binary wheels. #677
• The GIL is released a little more often now. #662
• AxesTuple does not allow construction of non-axes. #680
• KeyError is now thrown when accessing a non-existent item in a Category Axis #689
• WeightedViews now support np.cumsum #699

Bug fixes

• Fixed WeightedMean storages producing NaN for .variances() #695
• Modify local include slightly to enable WebAssembly compilation in Pyodide #702

Developer changes

• Use PyLint in CI to check for some style issues #690
• Developer (CMake) installs no longer require toml #698

Version 1.2.1

User changes

• musllinux wheels now provided along with manylinux #656

Bug fixes

• Fixed single-element negative growth fill #654

Developer changes

• No longer require Docker for clang-format, runs online too #610
• Using pybind11 2.8.0 #658

Version 1.2.0

User changes

• Python 3.10 officially supported, with wheels.
• Support subtraction on histograms #636
• Integer histograms are now signed #636

Bug fixes

• Support custom setters on AxesTuple subclasses. #627
• Faster picking if slices are not also used #645 or if they are #648 (1000x or more in some cases)
• Throw an error when an AxesTuple setter is the wrong length (inspired by zip strict in Python 3.10) #627
• Fix error thrown on comparison with axis and non-axis object #631
• Static typing no longer thinks storage= is required #604

Developer changes

• Support NumPy 1.21 for static type checking #625
• Use newer Boost 1.77 and Boost.Histogram 1.77+1 #594
• Provide nox support #647

Version 1.1.0

User changes

• Experimentally support list selection on categorical axes #577
• Support Python 3.8 on Apple Silicon #600
• Scaling and addition with a scalar affect flow bins too #580
• Change sum_of_deltas_squared to _sum_of_deltas_squared (was an implementation detail) #602

Bug fixes

• Fix "picking" on a flow bin #576
• Better error message on getattr #596

Developer changes

• Test on Python 3.10 beta releases #600
• Provide a CMakeLists for quick standalone Boost.Histogram C++ experiments #591
• Adding logging with PyTest failure output #575

Version 1.0.2

• Fix scaling a weighted storage #559
• Fix partial summation over a Categorical axis #564
• Support running type checking from Python < 3.8 #542