Features for testing the presence of bliss

class sage.features.bliss.Bliss

Bases: sage.features.join_feature.JoinFeature

A Feature which describes whether the sage.graphs.bliss module is available in this installation of Sage.

EXAMPLES:

sage: from sage.features.bliss import Bliss
sage: Bliss().require()  # optional - bliss
class sage.features.bliss.BlissLibrary

Bases: sage.features.CythonFeature

A Feature which describes whether the Bliss library is present and functional.

EXAMPLES:

sage: from sage.features.bliss import BlissLibrary
sage: BlissLibrary().require()  # optional - libbliss
sage.features.bliss.all_features()