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Added note on isin() to cookbook #62332

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Added note on isin() to cookbook #62332

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2de41b3
Added note on isin() to cookbook
roberttidball Sep 13, 2025
e3d1bc6
Error in ipython syntax
roberttidball Sep 13, 2025
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9 changes: 9 additions & 0 deletions doc/source/user_guide/cookbook.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -239,6 +239,15 @@ Ambiguity arises when an index consists of integers with a non-zero start or non

df[~((df.AAA <= 6) & (df.index.isin([0, 2, 4])))]

Using isin() to filter for values directly (this returns a series of boolean values).

.. ipython:: python

df = pd.DataFrame(
{"AAA": [4, 5, 6, 7], "BBB": [10, 20, 30, 40], "CCC": [100, 50, -30, -50]}
)
df["AAA"].isin([5, 7])

New columns
***********

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