GitLab

* PPIDataset

* Revert "PPIDataset"

This reverts commit 264bd0c960cfa698a7bb946dad132bf52c2d0c8a.

* SBMMixture dataset

* Update sbm.py

* fix example

* Update sbm.py

* Revert "Update sbm.py"

This reverts commit 066db5c89bd5e159981ae7cad1bfb883ea5db71d.

* Update sbm.py
Co-authored-by: xiang song(charlie.song) <classicxsong@gmail.com>