This is the first development release for PyThaiNLP v3.1.
You can install by pip install –pre pythainlp==3.1.0.dev0
PyThaiNLP 3.1 change log: https://github.com/PyThaiNLP/pythainlp/issues/643
GitHub Releases: https://github.com/PyThaiNLP/pythainlp/releases/tag/v3.1.0-dev0