PLY is a mature project that no longer makes releases. New features are no longer being added to it. However, if you feel that you have found a bug in PLY or its documentation, please submit an issue or a pull request.
Important note: The Github repo for PLY always contains the most
up-to-date version of the software. If you want to use the current
version, you should COPY the contents of the ply/ directory into
your own project and use it. There will be no future package-installable
releases of PLY.