Awkward Array

Overview

Use this skill to apply Awkward 2.0 best practices for jagged arrays, especially in HEP-style event data models. Keep guidance lean in this file and load reference notes only when needed.

Core workflow

1. Build an event data model (records) with ak.zip.
2. Filter early at the event level.
3. Perform combinatorics or derived calculations.
4. Add derived fields back into the record with ak.with_field.
5. Repeat until the final values are present in the EDM.

Reference guide

Load only the reference files that matches the task: