Ak.zip May 2026

: It is frequently used when reading from or writing to ROOT files (standard in physics) to ensure that attributes with the same "raggedness" (like jet or muon properties) are grouped correctly for storage. How to concatenate and interleave arrays

: In comparison to Pandas, where concat(axis=1) adds columns, ak.zip is the equivalent for adding fields to an Awkward Array record . ak.zip

The primary purpose of ak.zip is to take several arrays and "zip" them together so that each element of the resulting array is a record (like a row in a table) containing values from each input array. : It is frequently used when reading from

: If you pass a list or tuple of arrays instead of a dictionary, it creates an array of unnamed tuples. where concat(axis=1) adds columns