BUG: rolling().first() and rolling().last() don't work #62490
Description
Pandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this bug exists on the latest version of pandas.
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I have confirmed this bug exists on the main branch of pandas.
Reproducible Example
import pandas as pd
#According to documentation, this should happen
s = pd.Series(range(5))
s.rolling(3).last()
0 NaNIssue Description
What actually happens:
(Pdb) !s
0 0
1 1
2 2
3 3
4 4
dtype: int64
(Pdb) !s.rolling(3).last()
*** AttributeError: 'Rolling' object has no attribute 'last'
(Pdb) !s.rolling(3).first()
*** AttributeError: 'Rolling' object has no attribute 'first'
(Pdb)
(Pdb) pd.version
'2.2.1'
Expected Behavior
https://pandas.pydata.org/docs/dev/reference/api/pandas.core.window.rolling.Rolling.last.html
s = pd.Series(range(5))
s.rolling(3).last()
0 NaN
1 NaN
2 2.0
3 3.0
4 4.0
dtype: float64
Installed Versions
Replace this line with the output of pd.show_versions()