Zhang-Shasha: Tree Edit Distance in Python

ZSS is a Python library that implements the Zhang-Shasha algorithm for computing the tree edit distance between two ordered labeled trees. It is currently at version 1.2.0 and, while not frequently updated, provides a stable and specialized tool for comparing tree structures. The library can be extended with custom node formats and distance metrics, and optionally leverages `editdist` and `numpy` for enhanced functionality and performance.