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Add a warning about pipeline definition being executed only once. #5486

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May 28, 2024
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Add a warning about pipeline definition being executed only once. #5486

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7 changes: 7 additions & 0 deletions docs/pipeline.rst
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Expand Up @@ -50,6 +50,13 @@ The resulting graph is:

.. _processing_graph_structure:

.. important::
The pipeline definition function is excuted only once, when the pipeline is built,
and typically returns a ``dali.DataNode`` object or a tuple of thereof.
For convenience, it's possible to return other types, such as NumPy arrays, but those
are treated as constants and evaluated only once.


Processing Graph Structure
^^^^^^^^^^^^^^^^^^^^^^^^^^

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