Checkdigit

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=========

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checkdigit is a pure Python library built for identification numbers. You want to validate a credit card number, or maybe even calculate a missing digit on an ISBN code? We've got you covered 😎.

Want to know more? Check out the API Reference and documentation <https://checkdigit.readthedocs.io/en/latest/reference.html>_!

Installation

MacPorts <https://ports.macports.org/port/py-checkdigit/summary>_ 🍎

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sudo port install py-checkdigit

PyPi <https://pypi.org/project/checkdigit/>_ 🐍

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pip install checkdigit

✨ Features

• 📦 Works out of the box with all supported Python versions <https://endoflife.date/python>_ (3.7-3.11).
• ⌨️ PEP 561 compatible <https://www.python.org/dev/peps/pep-0561>_, with built in support for type checking.
• 🏃 Zero runtime dependencies. What you see is what you get.
• 🧮 Capable of calculating missing digits or validating a block of data.
• 📝 Extensive in-code comments and docstrings to explain how it works behind the scenes.

✅ Supported Formats

• Even/Odd binary parity <https://checkdigit.readthedocs.io/en/latest/_autosummary/checkdigit.parity.html#module-checkdigit.parity>_
• CRC <https://checkdigit.readthedocs.io/en/latest/_autosummary/checkdigit.crc.html#module-checkdigit.crc>_
• GS1 Standards <https://checkdigit.readthedocs.io/en/latest/_autosummary/checkdigit.gs1.html#module-checkdigit.gs1>_
  • EAN-8/13
  • GDTI
  • GLN
  • SSCC
  • UPC-A/E
  • etc. (all fixed length numeric GS1 data structures with a check digit)
• ISBN-10/13 <https://checkdigit.readthedocs.io/en/latest/_autosummary/checkdigit.isbn.html#module-checkdigit.isbn>_
• Luhn <https://checkdigit.readthedocs.io/en/latest/_autosummary/checkdigit.luhn.html#module-checkdigit.luhn>_
• Verhoeff <https://checkdigit.readthedocs.io/en/latest/_autosummary/checkdigit.verhoeff.html#module-checkdigit.verhoeff>_

For each of these formats, we provide functions to validate them and calculate missing digits.

Do you have any formats that you'd like to see supported? 🤔 Feel free to raise an issue, or even to send a pull request!

✨ Contributors

This project follows the all-contributors <https://github.com/all-contributors/all-contributors>_ specification. Contributions of any kind are welcome!

Want to help out? Check out the contributing page <https://checkdigit.rtfd.io/en/latest/contributing.html>_.

Thanks goes to these wonderful people (emoji key <https://allcontributors.org/docs/en/emoji-key>_):

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<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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    <td align="center"><a href="https://zeevox.net"><img src="https://avatars.githubusercontent.com/u/8385172?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Timothy Langer</b></sub></a><br /><a href="https://github.com/harens/checkdigit/commits?author=ZeevoX" title="Tests">⚠️</a> <a href="https://github.com/harens/checkdigit/commits?author=ZeevoX" title="Documentation">📖</a></td>
    <td align="center"><a href="https://github.com/OtherBarry"><img src="https://avatars.githubusercontent.com/u/6956537?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Charlie Wilson</b></sub></a><br /><a href="https://github.com/harens/checkdigit/commits?author=OtherBarry" title="Code">💻</a> <a href="https://github.com/harens/checkdigit/commits?author=OtherBarry" title="Tests">⚠️</a></td>
    <td align="center"><a href="https://github.com/sapieninja"><img src="https://avatars.githubusercontent.com/u/60101890?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Max Bowman</b></sub></a><br /><a href="https://github.com/harens/checkdigit/commits?author=sapieninja" title="Code">💻</a> <a href="https://github.com/harens/checkdigit/commits?author=sapieninja" title="Tests">⚠️</a></td>
    <td align="center"><a href="http://mohsen.1.banan.byname.net/contact"><img src="https://avatars.githubusercontent.com/u/39976397?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mohsen BANAN</b></sub></a><br /><a href="https://github.com/harens/checkdigit/issues?q=author%3AmohsenBanan" title="Bug reports">🐛</a></td>
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📙 License

This project is licensed under GPL-3.0-or-later <https://github.com/harens/checkdigit/blob/master/LICENSE>_.