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.. role:: doc
.. (Forward declaration for the "doc" role that Sphinx defines for interop with renderers that
are often used to show this doc and that are unaware of Sphinx (GitHub.com, PyPI.org, etc.).
Use :doc: rather than :ref: here for better interop as well.)
bidict
======
*The bidirectional mapping library for Python.*
Status
------
.. image:: https://img.shields.io/pypi/v/bidict.svg
:target: https://pypi.org/project/bidict
:alt: Latest release
.. image:: https://img.shields.io/readthedocs/bidict/main.svg
:target: https://bidict.readthedocs.io/en/main/
:alt: Documentation
.. image:: https://github.com/jab/bidict/actions/workflows/test.yml/badge.svg
:target: https://github.com/jab/bidict/actions/workflows/test.yml?query=branch%3Amain
:alt: GitHub Actions CI status
.. image:: https://img.shields.io/pypi/l/bidict.svg
:target: https://raw.githubusercontent.com/jab/bidict/main/LICENSE
:alt: License
.. image:: https://static.pepy.tech/badge/bidict
:target: https://pepy.tech/project/bidict
:alt: PyPI Downloads
.. image:: https://img.shields.io/badge/GitHub-sponsor-ff69b4
:target: https://github.com/sponsors/jab
:alt: Sponsor
Features
--------
- Mature: Depended on by
Google, Venmo, CERN, Baidu, Tencent,
and teams across the world since 2009
- Familiar, Pythonic APIs
that are carefully designed for
safety, simplicity, flexibility, and ergonomics
- Lightweight, with no runtime dependencies
outside Python's standard library
- Implemented in
concise, well-factored, fully type-hinted Python code
that is optimized for running efficiently
as well as for long-term maintenance and stability
(as well as `joy <#learning-from-bidict>`__)
- Extensively `documented <https://bidict.readthedocs.io>`__
- 100% test coverage
running continuously across all supported Python versions
(including property-based tests and benchmarks)
Installation
------------
``pip install bidict``
Quick Start
-----------
.. code:: python
>>> from bidict import bidict
>>> element_by_symbol = bidict({'H': 'hydrogen'})
>>> element_by_symbol['H']
'hydrogen'
>>> element_by_symbol.inverse['hydrogen']
'H'
For more usage documentation,
head to the :doc:`intro` [#fn-intro]_
and proceed from there.
Enterprise Support
------------------
Enterprise-level support for bidict can be obtained via the
`Tidelift subscription <https://tidelift.com/subscription/pkg/pypi-bidict?utm_source=pypi-bidict&utm_medium=referral&utm_campaign=readme>`__
or by `contacting me directly <mailto:jabronson@gmail.com>`__.
I have a US-based LLC set up for invoicing,
and I have 15+ years of professional experience
delivering software and support to companies successfully.
You can also sponsor my work through several platforms, including GitHub Sponsors.
See the `Sponsoring <#sponsoring>`__ section below for details,
including rationale and examples of companies
supporting the open source projects they depend on.
Voluntary Community Support
---------------------------
Please search through already-asked questions and answers
in `GitHub Discussions <https://github.com/jab/bidict/discussions>`__
and the `issue tracker <https://github.com/jab/bidict/issues?q=is%3Aissue>`__
in case your question has already been addressed.
Otherwise, please feel free to
`start a new discussion <https://github.com/jab/bidict/discussions>`__
or `create a new issue <https://github.com/jab/bidict/issues/new>`__ on GitHub
for voluntary community support.
Notice of Usage
---------------
If you use bidict,
and especially if your usage or your organization is significant in some way,
please let me know in any of the following ways:
- `star bidict on GitHub <https://github.com/jab/bidict>`__
- post in `GitHub Discussions <https://github.com/jab/bidict/discussions>`__
- `email me <mailto:jabronson@gmail.com>`__
Changelog
---------
For bidict release notes, see the :doc:`changelog`. [#fn-changelog]_
Release Notifications
---------------------
.. duplicated in CHANGELOG.rst:
(Would use `.. include::` but GitHub's renderer doesn't support it.)
Watch `bidict releases on GitHub <https://github.com/jab/bidict/releases>`__
to be notified when new versions of bidict are published.
Click the "Watch" dropdown, choose "Custom", and then choose "Releases".
Learning from bidict
--------------------
One of the best things about bidict
is that it touches a surprising number of
interesting Python corners,
especially given its small size and scope.
Check out :doc:`learning-from-bidict` [#fn-learning]_
if you're interested in learning more.
Contributing
------------
I have been bidict's sole maintainer
and `active contributor <https://github.com/jab/bidict/graphs/contributors>`__
since I started the project ~15 years ago.
Your help would be most welcome!
See the :doc:`contributors-guide` [#fn-contributing]_
for more information.
Sponsoring
----------
.. duplicated in CONTRIBUTING.rst
(Would use `.. include::` but GitHub's renderer doesn't support it.)
.. image:: https://img.shields.io/badge/GitHub-sponsor-ff69b4
:target: https://github.com/sponsors/jab
:alt: Sponsor through GitHub
Bidict is the product of thousands of hours of my unpaid work
over the 15+ years that I've been the sole maintainer.
If bidict has helped you or your company accomplish your work,
please sponsor my work through one of the following,
and/or ask your company to do the same:
- `GitHub <https://github.com/sponsors/jab>`__
- `PayPal <https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business=jabronson%40gmail%2ecom&lc=US&item_name=Sponsor%20bidict>`__
- `Tidelift <https://tidelift.com>`__
- `thanks.dev <https://thanks.dev>`__
- `Gumroad <https://gumroad.com/l/bidict>`__
- `a support engagement with my LLC <#enterprise-support>`__
If you're not sure which to use, GitHub is an easy option,
especially if you already have a GitHub account.
Just choose a monthly or one-time amount, and GitHub handles everything else.
Your bidict sponsorship on GitHub will automatically go
on the same regular bill as any other GitHub charges you pay for.
PayPal is another easy option for one-time contributions.
See the following for rationale and examples of companies
supporting the open source projects they depend on
in this manner:
- `<https://engineering.atspotify.com/2022/04/announcing-the-spotify-foss-fund/>`__
- `<https://blog.sentry.io/2021/10/21/we-just-gave-154-999-dollars-and-89-cents-to-open-source-maintainers>`__
- `<https://engineering.indeedblog.com/blog/2019/07/foss-fund-six-months-in/>`__
.. - `<https://sethmlarson.dev/blog/people-in-your-software-supply-chain>`__
.. - `<https://www.cognitect.com/blog/supporting-open-source-developers>`__
.. - `<https://vorpus.org/blog/the-unreasonable-effectiveness-of-investment-in-open-source-infrastructure/>`__
Finding Documentation
---------------------
If you're viewing this on `<https://bidict.readthedocs.io>`__,
note that multiple versions of the documentation are available,
and you can choose a different version using the popup menu at the bottom-right.
Please make sure you're viewing the version of the documentation
that corresponds to the version of bidict you'd like to use.
If you're viewing this on GitHub, PyPI, or some other place
that can't render and link this documentation properly
and are seeing broken links,
try these alternate links instead:
.. [#fn-intro] `<https://bidict.readthedocs.io/intro.html>`__ | `<docs/intro.rst>`__
.. [#fn-changelog] `<https://bidict.readthedocs.io/changelog.html>`__ | `<CHANGELOG.rst>`__
.. [#fn-learning] `<https://bidict.readthedocs.io/learning-from-bidict.html>`__ | `<docs/learning-from-bidict.rst>`__
.. [#fn-contributing] `<https://bidict.readthedocs.io/contributors-guide.html>`__ | `<CONTRIBUTING.rst>`__
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