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Reproducible Example

import pandas as pd
i = pd.date_range('2018-04-09', periods=4, freq='2D')
ts = pd.DataFrame({'A': [1, 2, 3, 4]}, index=i)
# bug-- shows just 1 row
print(ts.first(pd.DateOffset(days=3)))
# shows 2 rows as in the docs: https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.first.html
print(ts.first('3D'))

Issue Description

first() and last() take DateOffset, but passing a DateOffset always gives at most one row.

Expected Behavior

DateOffset(days=3) should work the same as '3D'.

Installed Versions

INSTALLED VERSIONS ------------------ commit : ca60aab7340d9989d9428e11a51467658190bb6b python : 3.10.4.final.0 python-bits : 64 OS : Darwin OS-release : 21.5.0 Version : Darwin Kernel Version 21.5.0: Tue Apr 26 21:08:22 PDT 2022; root:xnu-8020.121.3~4/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : en_US.UTF-8 LOCALE : en_US.UTF-8 pandas : 1.4.4 numpy : 1.24.2 pytz : 2022.7.1 dateutil : 2.8.2 setuptools : 67.2.0 pip : 22.1.2 Cython : None pytest : 7.2.1 hypothesis : None sphinx : None blosc : None feather : None xlsxwriter : None lxml.etree : None html5lib : None pymysql : None psycopg2 : None jinja2 : 3.1.2 IPython : 8.7.0 pandas_datareader: None bs4 : 4.11.1 bottleneck : None brotli : None fastparquet : None fsspec : 2023.1.0 gcsfs : None markupsafe : 2.1.1 matplotlib : 3.6.2 numba : None numexpr : None odfpy : None openpyxl : None pandas_gbq : None pyarrow : 8.0.0 pyreadstat : None pyxlsb : None s3fs : None scipy : None snappy : None sqlalchemy : None tables : None tabulate : None xarray : None xlrd : None xlwt : None zstandard : None

Comment From: DeaMariaLeon

take

Comment From: DeaMariaLeon

Thak you for the report @mvashishtha. Unfortunately this function will be deprecated: https://github.com/pandas-dev/pandas/issues/45908#:~:text=As%20discussed%20in,lot%20more%20explicit