This project reuses the Dask DataFrame project, which was originally designed for Pandas, with the newer library cuDF. Because we use the same Dask classes for both projects there are often methods that are implemented for Pandas, but not yet for cuDF. As a result users looking at the full Dask DataFrame API can be misleading, and often lead to frustration when operations that are advertised in the Dask API do not work as expected with cuDF. We apologize for this in advance.