BUG: no last function in window rolling

[algonell]

Pandas version checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

s = pd.Series(range(5))
s.rolling(3).last()

Issue Description

The reproducible example is right from the docs.
Same goes for agg invocations.

Typical error messages:

• AttributeError: 'last' is not a valid function for 'Rolling' object
• AttributeError: 'Rolling' object has no attribute 'last'

Expected Behavior

Last if available.

Installed Versions

commit : 0691c5c
python : 3.13.3
python-bits : 64
OS : Linux
OS-release : 6.14.2-arch1-1
Version : #1 SMP PREEMPT_DYNAMIC Thu, 10 Apr 2025 18:43:59 +0000
machine : x86_64
processor :
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 2.2.3
numpy : 2.1.3
pytz : 2025.2
dateutil : 2.9.0.post0
pip : 25.0.1
Cython : None
sphinx : None
IPython : 9.1.0
adbc-driver-postgresql: None
adbc-driver-sqlite : None
bs4 : 4.13.4
blosc : None
bottleneck : 1.4.2
dataframe-api-compat : None
fastparquet : None
fsspec : None
html5lib : 1.1
hypothesis : None
gcsfs : None
jinja2 : 3.1.5
lxml.etree : 5.3.2
matplotlib : 3.10.1
numba : 0.61.0
numexpr : 2.10.2
odfpy : None
openpyxl : 3.1.5
pandas_gbq : None
psycopg2 : None
pymysql : None
pyarrow : 19.0.1
pyreadstat : None
pytest : None
python-calamine : None
pyxlsb : None
s3fs : None
scipy : 1.15.2
sqlalchemy : None
tables : None
tabulate : 0.9.0
xarray : None
xlrd : 2.0.1
xlsxwriter : None
zstandard : None
tzdata : 2025.1
qtpy : None
pyqt5 : None

[chilin0525]

@algonell Are you testing this on the main branch? I can reproduce the code snippet from the documentation and obtain the correct result on the main branch.

[algonell]

@chilin0525 My bad, I am not testing main/latest.

[snitish]

@algonell The first and last methods were recently added to rolling (#60579). They will be available in pandas 3.0.0