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improved dataframe example to avoid confusion #41182

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Merged
merged 2 commits into from
May 7, 2021
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improved dataframe example to avoid confusion #41182

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867d6ef
improved dataframe example to avoid confusion
Apr 27, 2021
9a2a6aa
simplified explaination of nunique
Apr 29, 2021
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8 changes: 4 additions & 4 deletions pandas/core/frame.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9803,9 +9803,9 @@ def _get_data() -> DataFrame:

def nunique(self, axis: Axis = 0, dropna: bool = True) -> Series:
"""
Count distinct observations over requested axis.
Count number of distinct elements in specified axis.

Return Series with number of distinct observations. Can ignore NaN
Return Series with number of distinct elements. Can ignore NaN
values.

Parameters
Expand All @@ -9827,10 +9827,10 @@ def nunique(self, axis: Axis = 0, dropna: bool = True) -> Series:

Examples
--------
>>> df = pd.DataFrame({'A': [1, 2, 3], 'B': [1, 1, 1]})
>>> df = pd.DataFrame({'A': [4, 5, 6], 'B': [4, 1, 1]})
>>> df.nunique()
A 3
B 1
B 2
dtype: int64

>>> df.nunique(axis=1)
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