chunk_boxes

function of dascore.lazy.execute

source

chunk_boxes(
    array: ‘LazyArray’ ,
    block_size: ‘int | None’ = None,
)-> ‘list[Box]’

Cut a lazy array into the boxes it is computed in.

There is one box if none of the arrays needed to compute it is larger than the block size, or if no step computes anything: reading in pieces would only open each file again. Otherwise the box is halved along the first axis worth cutting until its arrays fit. An axis a step needs whole is never worth cutting, so the block size is aimed for rather than promised.

Parameters

Parameter	Description
array	The lazy array.
block_size	The most bytes any one array of a box should hold; the lazy_block_size setting by default, and 0 for one box.