Flexible Python Red Black Tree Implementation

This library provides a flexible Python implementation of red-black trees, offering a low standard deviation in operation times for insertion, deletion, and lookup. It includes modules for both set-like (enforcing uniqueness) and dictionary-like use. The library is known to work across CPython 2.x, CPython 3.x, PyPy, and Jython. The current version is 1.22, with an infrequent release cadence; the last major update was in December 2023.