This abstract base class is meant to implement the main methods available to all basis set classes that are specific to an analytical case. This ensures that all analytical cases have the same basic API, while avoiding code repetition.
As an example, it is used to define the ~siegpy.swpbasisset.SWPBasisSet class, which is the specific basis set class for the analytical 1D Square-Well potential case. You might notice that only a few methods were implemented there.
siegpy.analyticbasisset.AnalyticBasisSet