This is a Python 3 library for reading and working with existing Spatio-Temporal Asset Catalogs (STAC). It can be used to

Open and traverse STAC catalogs
Download assets from STAC Items, using templated path names
Save and load Self-contained STAC catalogs

The features for creating and updating existing catalogs in past versions have been removed in 0.4.0. If writing catalogs is needed, see PySTAC.