PyMatching

PyMatching is a high-performance Python package for decoding quantum error correcting codes using minimum-weight perfect matching algorithms. It provides an efficient C++ implementation of the blossom algorithm, significantly speeding up decoding for large codes. The library is actively maintained with frequent minor releases for bug fixes and feature additions, and major updates approximately every 1-2 years introducing significant architectural changes or performance improvements. The current version is 2.3.1.