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Using Custom Datasources
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Datasets can read and write in parallel to `custom datasources <package-ref.html#custom-datasource-api>`__ defined in Python.
Once you have implemented `YourCustomDataSource`, you can use it like any other source in Ray Data:

.. code-block:: python

    # Read from a custom datasource.
    ds = ray.data.read_datasource(YourCustomDatasource(), **read_args)

    # Write to a custom datasource.
    ds.write_datasource(YourCustomDatasource(), **write_args)