cf.Data.todict

Data.todict(optimize_graph=True)

Return a dictionary of the dask graph key/value pairs.

New in version 3.15.0.

See also

to_dask_array, tolist

Parameters

optimize_graph: bool

If True, the default, then prior to being converted to a dictionary, the graph is optimised to remove unused chunks. Note that optimising the graph can add a considerable performance overhead.

Returns

dict

The dictionary of the dask graph key/value pairs.

Examples

>>> d = cf.Data([1, 2, 3, 4], chunks=2)
>>> d.todict()
{('array-2f41b21b4cd29f757a7bfa932bf67832', 0): array([1, 2]),
 ('array-2f41b21b4cd29f757a7bfa932bf67832', 1): array([3, 4])}
>>> e = d[0]
>>> e.todict()
{('getitem-153fd24082bc067cf438a0e213b41ce6',
  0): (<function dask.array.chunk.getitem(obj, index)>, ('array-2f41b21b4cd29f757a7bfa932bf67832',
   0), (slice(0, 1, 1),)),
 ('array-2f41b21b4cd29f757a7bfa932bf67832', 0): array([1, 2])}
>>> e.todict(optimize_graph=False)
{('array-2f41b21b4cd29f757a7bfa932bf67832', 0): array([1, 2]),
 ('array-2f41b21b4cd29f757a7bfa932bf67832', 1): array([3, 4]),
 ('getitem-153fd24082bc067cf438a0e213b41ce6',
  0): (<function dask.array.chunk.getitem(obj, index)>, ('array-2f41b21b4cd29f757a7bfa932bf67832',
   0), (slice(0, 1, 1),))}