8000 Add Parquet Upload Support to create_dataset() by meghan-joshi · Pull Request #1399 · openml/openml-python · GitHub
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Add Parquet Upload Support to create_dataset() #1399

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Add Parquet Upload Support to create_dataset() #1399

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meghan-joshi
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@meghan-joshi meghan-joshi commented Apr 24, 2025 •
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This PR adds support for uploading .parquet files via the create_dataset() function in the OpenML Python client.

  • Adds a parquet_path argument to create_dataset
  • Uses MinIO-compatible upload with correct content-type
  • Preserves backward compatibility with ARFF upload
  • Metadata now includes dataset format ("parquet" or "arff")
  • Includes a unit test for Parquet upload

Closes #1141.

cc: @PGijsbers @mfeurer

@meghan-joshi meghan-joshi mentioned this pull request Apr 24, 2025
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PGijsbers reviewed Jun 16, 2025
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Sorry for the delay, and thanks for taking the time to contribute :)

The OpenML server currently does not yet support direct uploading for parquet files.
While it would be nice to have preparation for support already present, we cannot accept the current PR because of a number of problems:

  • It seems to delete much of the dataset class
  • It deletes entire test modules
  • It includes git files

Because of these reasons, I'm closing the PR. We'd be happy to help you get started on more appropriate issue - just let us know :)

@PGijsbers PGijsbers closed this Jun 16, 2025
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Upload datasets in parquet
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