The bidirectional mapping library for Python.
Project description
The bidirectional mapping library for Python.
Status
bidict:
has been used for many years by several teams at Google, Venmo, CERN, Bank of America Merrill Lynch, Bloomberg, Two Sigma, and many others
has carefully designed APIs for safety, simplicity, flexibility, and ergonomics
is fast, lightweight, and has no runtime dependencies other than Python’s standard library
integrates natively with Python’s collections.abc interfaces
provides type hints for all public APIs
is implemented in concise, well-factored, pure (PyPy-compatible) Python code that is optimized for running efficiently as well as for reading and learning [1]
has extensive docs and test coverage (including property-based tests and benchmarks) run continuously on all supported Python versions
Note: Python 3 Required
As promised in the 0.18.2 release (see changelog [2]), Python 2 is no longer supported. Version 0.18.3 is the last release of bidict that supports Python 2. This makes bidict more efficient on Python 3 and enables further improvement to bidict in the future. See python3statement.org for more info.
Installation
pip install bidict
Quick Start
>>> 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 intro [3] and proceed from there.
Community Support
If you are thinking of using bidict in your work, or if you have any questions, comments, or suggestions, I’d love to know about your use case and provide as much voluntary support for it as possible.
Please feel free to leave a message in the chatroom or open a new issue on GitHub. You can search through existing issues before creating a new one in case your questions or concerns have been adressed there already.
Enterprise-Grade Support via Tidelift
If your use case requires a greater level of support, enterprise-grade support for bidict can be obtained via the Tidelift subscription.
Notice of Usage
If you use bidict, and especially if your usage or your organization is significant in some way, please let me know.
You can:
leave a message in the chat room
Changelog
See the changelog [2] for a history of notable changes to bidict.
Release Notifications
Subscribe to releases on GitHub or libraries.io to be notified when new versions of bidict are released.
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 learning-from-bidict [1] if you’re interested in learning more.
Contributing
bidict is currently a one-person operation maintained on a voluntary basis.
Your help would be most welcome!
Reviewers Wanted!
One of the most valuable ways to contribute to bidict – and to explore some interesting Python corners [1] while you’re at it – is to review the relatively small codebase.
Please create an issue or pull request with any improvements you’d propose or any other results you found. Submitting a draft PR with feedback in inline code comments, or a “Review results” issue, would each work well.
You can also +1 this issue to sign up to give feedback on future proposed changes that are in need of a reviewer.
Giving Back
bidict is the product of hundreds of hours of unpaid, voluntary work.
If bidict has helped you accomplish your work, especially work you’ve been paid for, please consider chipping in toward the costs of its maintenance and development and/or ask your organization to do the same.
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:
Next: intro [3]
Release history Release notifications | RSS feed
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