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Pandas DataFrame | first method
schedule Aug 12, 2023
Last updated local_offer
Tags Python●Pandas
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Pandas DataFrame.first(~) method returns all rows that fall in the first n days (or whatever time unit you specify), where n is the specified offset.
Parameters
1. offset | string or DateOffset or dateutil.relativedelta
The datetime offset.
Return value
A DataFrame.
Examples
Consider the following DataFrame:
index_datetime = pd.date_range("2020-12-25", periods=5, freq="D") # Daysdf = pd.DataFrame({"A":["a","b","c","d","e"]}, index=index_datetime)df
A2020-12-25 a2020-12-26 b2020-12-27 c2020-12-28 d2020-12-29 e
To fetch the first 3 days:
df.first("3D")
A2020-12-25 a2020-12-26 b2020-12-27 c
Published by Isshin Inada
Edited by 0 others
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Official Pandas Documentation
https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.first.html#pandas.DataFrame.first
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