ak.singletons¶
Defined in awkward.operations.structure on line 2969.
- ak.singletons(array, highlevel=True, behavior=None)¶
- Parameters
array – Data to wrap in lists of length 1 if present and length 0 if missing (None).
highlevel (bool) – If True, return an
ak.Array
; otherwise, return a low-levelak.layout.Content
subclass.behavior (None or dict) – Custom
ak.behavior
for the output array, if high-level.
Returns a singleton list (length 1) wrapping each non-missing value and an empty list (length 0) in place of each missing value.
For example,
>>> array = ak.Array([1.1, 2.2, None, 3.3, None, None, 4.4, 5.5])
>>> print(ak.singletons(array))
[[1.1], [2.2], [], [3.3], [], [], [4.4], [5.5]]
See ak.firsts
to invert this function.