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DOC: Warn about dtype inference with raw=True in DataFrame.apply #62384

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DOC: Warn about dtype inference with raw=True in DataFrame.apply #62384

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1970f9e
DOC: Warn about dtype inference with raw=True in DataFrame.apply
pranavkp71 Sep 20, 2025
2c06f64
DOC: fix pre-commit lint issues in apply docstring
pranavkp71 Sep 20, 2025
85f4628
DOC: simplify dtype inference note in DataFrame.apply
pranavkp71 Oct 8, 2025
6f644aa
Merge branch 'main' into fix-docs
pranavkp71 Oct 8, 2025
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5 changes: 5 additions & 0 deletions pandas/core/frame.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10629,6 +10629,11 @@ def apply(
If you are just applying a NumPy reduction function this will
achieve much better performance.

.. warning::

When ``raw=True``, the result dtype is inferred from the **first**
returned value.

result_type : {'expand', 'reduce', 'broadcast', None}, default None
These only act when ``axis=1`` (columns):

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