Move pyarrow to runtime import in datasets endpoint#704
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Summary
pyarrowwas imported inside theTYPE_CHECKINGblock, which is only evaluated by static analysis tools (e.g., mypy), not at runtime. This caused aNameErrorwhen creating a new notebook, since thefilter_dataset_fileendpoint referencespaat runtime.Type of Change
Changes (by file)
DashAI/back/api/api_v1/endpoints/datasets.py: movedimport pyarrow as paout of theTYPE_CHECKINGblock into the top-level runtime imports.Testing (optional)
Create a new notebook — the endpoint should no longer raise
NameError: name 'pa' is not defined.