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A check digit library for data validation

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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!


MacPorts 🍎

sudo port install py-checkdigit

PyPi 🐍

pip install checkdigit

✨ Features

  • 📦 Works out of the box with all supported Python versions (3.7-3.11).

  • ⌨️ PEP 561 compatible, 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

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

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. Thank you!

📙 License

This project is licensed under GPL-3.0-or-later.

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