Dali Loader using a NamedTuple datatype instead of an array

Describe the question.

I am following the example for external input to the dali loader. My datatype going to my model is a NamedTuple. When I try to create the dataloader:
dataloader = DALIGenericIterator(pipeline, ["image"])
I get an error associated with my NamedTuple type:
TypeError: Illegal pipeline output type. The output 0 contains a nested DataNode. Missing list/tuple expansion (*) is the likely cause.

I am not sure how the Dali loader can accept a NamedTuple type. Is it possible? I am not sure what to put for the second argument in the creation of the dataloader iterator (DALIGenericIterator).

Thanks for the help.

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