checkdigit

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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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.. code-block::

sudo port install py-checkdigit

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

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.. code-block::

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!

🔨 Contributing

• Contributing Page: <https://checkdigit.rtfd.io/en/latest/contributing.html>_
• Issue Tracker: <https://github.com/harens/checkdigit/issues>_
• Source Code: <https://github.com/harens/checkdigit>_

Any change, big or small, that you think can help improve this project is more than welcome 🎉.

As well as this, feel free to open an issue with any new suggestions or bug reports. Every contribution is appreciated.

To find out more, please read our contributing page <https://checkdigit.readthedocs.io/en/latest/contributing.html>_. Thank you!

📙 License

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