Get the unidimensional chunk indexes needed to get a
slice of a SChunk or a NDArray.
Parameters:
schunk¶ (SChunk or NDArray) – The super-chunk or ndarray container.
key¶ (tuple(int, int), int, slice or sequence of slices) – If it is a super-chunk, a tuple with the start and stop of the slice, an integer,
or a single slice.
If it is a ndarray, sequences of slices (one per dim) are accepted too.
Returns:
out – An array with the unidimensional chunk indexes.
