Kreuzberg is a Python library offering asynchronous text extraction capabilities from various document formats, including PDFs, images, and office files, with local processing and minimal dependencies. The library provides both single-item and batch processing options, integrating tools like Tesseract OCR and Pandoc for comprehensive format support.
A technical exploration demonstrates how Unicode variation selectors can be used to encode arbitrary data within any Unicode character, making it possible to hide invisible messages in text or emojis while surviving copy/paste operations.
An extension to regular expressions called 'transductive regular expressions' (trre) introduces a new ':' symbol for pattern matching and text modification, offering a more natural approach to text editing than traditional regex. The implementation includes a command-line tool that supports various operations like replacement, deletion, and insertion, utilizing Finite State Transducers for processing.