caterva2.Client.get_chunk

Client.get_chunk(path, nchunk)

Retrieves a specified compressed chunk from a file.

Parameters:

• path (str) – Path of the dataset.

• nchunk (int) – ID of the unidimensional chunk to retrieve.

Returns:

The compressed chunk data.

Return type:

bytes obj

Examples

>>> import caterva2 as cat2
>>> client = cat2.Client('https://demo.caterva2.net')
>>> client.subscribe('example')
'Ok'
>>> info_schunk = client.get_info('example/ds-2d-fields.b2nd')['schunk']
>>> info_schunk['nchunks']
1
>>> info_schunk['cratio']
6.453000645300064
>>> chunk = client.get_chunk('example/ds-2d-fields.b2nd', 0)
>>> info_schunk['chunksize'] / len(chunk)
6.453000645300064