Fix lazy imports for pyarrow and datasets by Irozuku · Pull Request #697 · DashAISoftware/dashAI

Irozuku · 2026-06-11T20:16:50Z

Summary

Deferred dependencies (pyarrow, datasets) to lazy imports so they are only loaded when actually used, not at app startup.

Check all that apply like this [x]:

DashAI/back/types/dashai_image.py: replaced eagerly-evaluated pa_type class variable with a lazy descriptor that imports pyarrow on first access
DashAI/back/api/api_v1/endpoints/dataset_source.py: moved infer_types import inside the function body, breaking the dataset_source -> type_inference -> dashai_dataset -> datasets startup import chain
DashAI/back/api/api_v1/endpoints/datasets.py: moved pyarrow import inside function/method bodies where it is used
DashAI/back/dataloaders/classes/image_dataloader.py: moved datasets, DashAIDataset, to_dashai_dataset, and DashAIImage imports inside the load method
DashAI/back/models/hugging_face/metrics_callback.py: moved to_dashai_dataset import inside __init__

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Irozuku added 3 commits June 11, 2026 16:07

fix: lazy import pyarrow in dashai_image and dataset_source startup c…

bd5e485

…hain

fix: lazy import pyarrow in datasets endpoint

b34bca8

fix: lazy import datasets and DashAIDataset in image dataloader

1548d69

Irozuku added help wanted Extra attention is needed back Backend work labels Jun 11, 2026

fix: lazy import DashAIDataset in metrics callback

de29490

Irozuku changed the title ~~Fix lazy imports for pyarrow, datasets, and OpenML sources~~ Fix lazy imports for pyarrow and datasets Jun 11, 2026

Irozuku force-pushed the fix/missing-lazy branch 2 times, most recently from c85d08d to de29490 Compare June 11, 2026 21:24

fix: simplify lazy import of DashAIDataset and remove unnecessary dec…

0848e15

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