Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

Pandas DataFrame first() Method

❮ DataFrame Reference


Example

Return the rows for the first 5 days:

import pandas as pd

jan = pd.date_range(start='2021-01-01', end='2021-01-31')

data = {
  "registered": [5, 4, 3, 4, 3, 5, 1, 6, 1, 9, 5, 3, 7, 2, 8, 4, 4, 6, 4, 3, 2, 5, 3, 4, 2, 6, 8, 5, 3, 4, 5]
}
df = pd.DataFrame(data, index=jan)

print(df.first('5D'))
Try it Yourself »

Definition and Usage

The first() method returns the first n rows, based on the specified value.

The index have to be dates for this method to work as expected.


Syntax

dataframe.first(offset)

Parameters

Parameter Description
offset Required. A String or a Date offset. Specifies the dates to return

Return Value

A DataFrame, with the specified rows.


❮ DataFrame Reference

×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
sales@w3schools.com

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
help@w3schools.com

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.