with_field(base, what, where=None, highlevel=True, behavior=None)¶
base – Data containing records or tuples.
what – Data to add as a new field.
where (None or str or non-empy iterable of str) – If None, the new field has no name (can be accessed as an integer slot number in a string); If str, the name of the new field. If iterable, it is interpreted as a path where to add the field in a nested record.
highlevel (bool) – If True, return an
ak.Array; otherwise, return a low-level
behavior (None or dict) – Custom
ak.behaviorfor the output array, if high-level.
ak.Record.__setitem__ for a variant that
changes the high-level object in-place. (These methods internally use
ak.with_field, so performance is not a factor in choosing one over the