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GH-49905: [Archery] Fix archery benchmark diff with pandas 3 #49912

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Merged
pitrou merged 1 commit into from
May 6, 2026
Merged

GH-49905: [Archery] Fix archery benchmark diff with pandas 3 #49912

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18 changes: 16 additions & 2 deletions dev/archery/archery/compat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@

import pathlib
import sys
import types


def _is_path_like(path):
Expand Down Expand Up @@ -47,8 +48,21 @@ def _stringify_path(path):


def _import_pandas():
# ARROW-13425: avoid importing PyArrow from Pandas
sys.modules['pyarrow'] = None
# ARROW-13425: hide the in-tree PyArrow from pandas so it doesn't try
# to use a possibly-broken development build.
# ARROW-49905: The original workaround sets ``sys.modules['pyarrow'] = None``,
# but pandas >= 3.0 has a different import mechanism resulting in
# ``AttributeError: 'NoneType' object has no attribute 'Array'``
# on the first DataFrame construction (in ``pandas._libs.lib.is_pyarrow_array``).
# Instead, we install a minimal stub where ``isinstance(obj, pa.Array)``
# check returns False for every real object.
if "pyarrow" not in sys.modules:
stub = types.ModuleType("pyarrow")
stub.Array = type("Array", (), {})
stub.ChunkedArray = type("ChunkedArray", (), {})
# pandas.compat.pyarrow parses ``pa.__version__`` at import time.
stub.__version__ = "0.0.0"
sys.modules["pyarrow"] = stub
import pandas as pd
return pd

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