fastjet

Use when running jet clustering in Python with the Scikit-HEP fastjet package (or migrating from the deprecated pyjet): calling anti-kt or Cambridge/Aachen algorithms on particle four-vectors, accessing jet constituents, computing jet substructure variables (N-subjettiness, soft drop), clustering jets from generator-level events read with pyhepmc or pylhe, or processing many events over awkward arrays with the array-oriented (columnar) interface to avoid slow Python loops.