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Fix ArrowEngine bug in use of clear_known_categories #6887

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merged 4 commits into from Nov 25, 2020

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rjzamora
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Closes #6885

Separates index from columns when clearing known categories.

  • Tests added / passed
  • Passes black dask / flake8 dask

@jsignell
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Thanks for this @rjzamora!

@jsignell jsignell merged commit 2bfc965 into dask:master Nov 25, 2020
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Successfully merging this pull request may close these issues.

Reading a Parquet file saved with a categorical index using Pyarrow raises an exception.
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