A Python extension written in C for fast computation of: Levenshtein (edit) distance and edit sequence manipulation; string similarity; approximate median strings, and generally string averaging; string sequence and set similarity. Levenshtein has a some overlap with difflib (SequenceMatcher). It supports only strings, not arbitrary sequence types, but on the other hand it's much faster. Note the project was renamed, and python-Levenshtein is now just a metapackage installing the Levenshtein package.