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DOC: mention .attrs are preserved in Parquet IO for pyarrow engine #61912

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DOC: mention .attrs are preserved in Parquet IO for pyarrow engine #61912

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3 changes: 2 additions & 1 deletion pandas/core/frame.py
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Expand Up @@ -2958,7 +2958,8 @@ def to_parquet(
is expected and consistent with pandas' handling of categorical data.
To manage file size and ensure a more predictable roundtrip process,
consider using :meth:`Categorical.remove_unused_categories` on the
DataFrame before saving.
DataFrame before saving
* When using the "pyarrow" engine, `DataFrame.attrs` are stored as part of the file's metadata and restored on reading.
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@arthurlw arthurlw Jul 21, 2025 •
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CI is failing because this line exceeds the maximum allowed length. Try splitting it into two lines to satisfy the linter.


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