uhi 1.0.0
Unified Histogram Interface: tools to help library authors work with histograms
Requires Python: >=3.9

# UHI: Universal Histogram Interface

[![Actions Status][actions-badge]][actions-link]
[![Documentation Status][rtd-badge]][rtd-link]
[![pre-commit.ci Status][pre-commit-badge]][pre-commit-link]
[![Code style: black][black-badge]][black-link]

[![PyPI version][pypi-version]][pypi-link]
[![Conda-forge version][conda-badge]][conda-link]
[![PyPI platforms][pypi-platforms]][pypi-link]

[![GitHub Discussion][github-discussions-badge]][github-discussions-link]
[![Gitter][gitter-badge]][gitter-link]
[![Zenodo][zenodo-badge]][zenodo-link]
[![Scikit-HEP][sk-badge]](https://scikit-hep.org/)
[![SPEC 4 — Using and Creating Nightly Wheels][spec4-badge]][spec4-link]


This is a package meant primarily for [documenting][rtd-link] histogram
indexing and the PlottableHistogram Protocol and any future cross-library
standards. It also contains the code for the PlottableHistogram Protocol, to be
used in type checking libraries wanting to conform to the protocol. Eventually,
it might gain a set of tools for testing conformance to UHI indexing, as well.
It is not usually a runtime dependency, but only a type checking, testing,
and/or docs dependency in support of other libraries (such as
[boost-histogram][] 0.13+, [hist][] 2.1+, [mplhep][] 0.2.15+, [uproot][] 4+,
and [histoprint][] 2+).  There are a few useful runtime usable components
(listed below). Older versions are available for Python 3.6+. [See what's
new](https://github.com/scikit-hep/uhi/releases).

To assist plotting libraries in accepting Histograms from classic sources, see
`uhi.numpy_plottable.ensure_plottable_histogram`, which will adapt NumPy style
tuples into a simple PlottableHistogram.

The Protocols provided do support runtime checking, so
`isinstance(h, uhi.typing.plotting.PlottableHistogram)` is valid at runtime and
might be simpler than manually checking for the expected methods.

[actions-badge]:            https://github.com/Scikit-HEP/uhi/workflows/CI/badge.svg
[actions-link]:             https://github.com/Scikit-HEP/uhi/actions
[black-badge]:              https://img.shields.io/badge/code%20style-black-000000.svg
[black-link]:               https://github.com/psf/black
[conda-badge]:              https://img.shields.io/conda/vn/conda-forge/uhi
[conda-link]:               https://github.com/conda-forge/uhi-feedstock
[github-discussions-badge]: https://img.shields.io/static/v1?label=Discussions&message=Ask&color=blue&logo=github
[github-discussions-link]:  https://github.com/Scikit-HEP/uhi/discussions
[gitter-badge]:             https://badges.gitter.im/https://github.com/Scikit-HEP/uhi/community.svg
[gitter-link]:              https://gitter.im/https://github.com/Scikit-HEP/uhi/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge
[zenodo-badge]:             https://zenodo.org/badge/DOI/10.5281/zenodo.13883674.svg
[zenodo-link]:              https://doi.org/10.5281/zenodo.13883674
[pre-commit-badge]:         https://results.pre-commit.ci/badge/github/scikit-hep/uhi/main.svg
[pre-commit-link]:          https://results.pre-commit.ci/repo/github/309772485
[pypi-link]:                https://pypi.org/project/uhi/
[pypi-platforms]:           https://img.shields.io/pypi/pyversions/uhi
[pypi-version]:             https://badge.fury.io/py/uhi.svg
[rtd-badge]:                https://readthedocs.org/projects/uhi/badge/?version=latest
[rtd-link]:                 https://uhi.readthedocs.io/en/latest/?badge=latest
[sk-badge]:                 https://scikit-hep.org/assets/images/Scikit--HEP-Project-blue.svg
[spec4-badge]:              https://img.shields.io/badge/SPEC-4-green?labelColor=%23004811&color=%235CA038
[spec4-link]:               https://scientific-python.org/specs/spec-0004/

[boost-histogram]:          https://github.com/scikit-hep/boost-histogram
[hist]:                     https://github.com/scikit-hep/hist
[mplhep]:                   https://github.com/scikit-hep/mplhep
[uproot]:                   https://github.com/scikit-hep/uproot4
[histoprint]:               https://github.com/scikit-hep/histoprint