Enable string conversion for Scalar
objects that contain a schema
#2468
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Why are the changes needed?
If attempting to create a string representation of a literal whose scalar contains a
schema
(e.g. pandera DataFrames), an "Unknown scalar type"ValueError
is raised.It is often nice to just print out the outputs of a workflow execution, but that's currently not possible if a pandera-typed DataFrame is one of them.
What changes were proposed in this pull request?
We simply return the schema's URI, similarly to how
structured_dataset
is handled.How was this patch tested?
I expanded on the existing unit test