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ENH: Need new semantics for selecting parquet engine in Pandas 3 #56642

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ENH: Need new semantics for selecting parquet engine in Pandas 3#56642
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BlockedDeprecateFunctionality to remove in pandasFunctionality to remove in pandasIO Parquetparquet, featherparquet, feather
@davetapley

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@davetapley
davetapley
opened on Dec 27, 2023
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Feature Type

  • Adding new functionality to pandas

  • Changing existing functionality in pandas

  • Removing existing functionality in pandas

Problem Description

This isn't a problem right now, but I just wanted to call it out ahead of 3.0:

This behavior:

pandas/pandas/io/parquet.py

Lines 433 to 437 in 8b77271

engine : {{'auto', 'pyarrow', 'fastparquet'}}, default 'auto'
Parquet library to use. If 'auto', then the option
``io.parquet.engine`` is used. The default ``io.parquet.engine``
behavior is to try 'pyarrow', falling back to 'fastparquet' if
'pyarrow' is unavailable.

Won't really make sense in 3.0 and onwards, because:

pandas/doc/source/whatsnew/v2.2.0.rst

Line 87 in 8b77271

- PyArrow will become a required dependency with pandas 3.0 to accommodate this change.

Feature Description

I guess just always use pyarrow unless explicitly told to use fastparquet?

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