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Pandas Example – Write a Pandas program to reset index in a given DataFrame

By on Wednesday, April 7, 2021

(Python Example for Beginners)

 

Write a Pandas program to reset index in a given DataFrame.

Sample data:
Original DataFrame
attempts name qualify score
0 1 Anastasia yes 12.5
1 3 Dima no 9.0
2 2 Katherine yes 16.5
3 3 James no NaN
4 2 Emily no 9.0
5 3 Michael yes 20.0
6 1 Matthew yes 14.5
7 1 Laura no NaN
8 2 Kevin no 8.0
9 1 Jonas yes 19.0
After removing first and second rows
attempts name qualify score
2 2 Katherine yes 16.5
3 3 James no NaN
4 2 Emily no 9.0
5 3 Michael yes 20.0
6 1 Matthew yes 14.5
7 1 Laura no NaN
8 2 Kevin no 8.0
9 1 Jonas yes 19.0
Reset the Index:
index attempts name qualify score
0 2 2 Katherine yes 16.5
1 3 3 James no NaN
2 4 2 Emily no 9.0
3 5 3 Michael yes 20.0
4 6 1 Matthew yes 14.5
5 7 1 Laura no NaN
6 8 2 Kevin no 8.0
7 9 1 Jonas yes 19.0

 

Sample Solution :

Python Code :


import pandas as pd
import numpy as np

exam_data = {'name': ['Anastasia', 'Dima', 'Katherine', 'James', 'Emily', 'Michael', 'Matthew', 'Laura', 'Kevin', 'Jonas'],
        'score': [12.5, 9, 16.5, np.nan, 9, 20, 14.5, np.nan, 8, 19],
        'attempts': [1, 3, 2, 3, 2, 3, 1, 1, 2, 1],
        'qualify': ['yes', 'no', 'yes', 'no', 'no', 'yes', 'yes', 'no', 'no', 'yes']}

df = pd.DataFrame(exam_data)
print("Original DataFrame")
print(df)
print("nAfter removing first and second rows")

df = df.drop([0, 1])
print(df)
print("nReset the Index:")

df = df.reset_index()
print(df)

Sample Output:

  Original DataFrame
   attempts       name qualify  score
0         1  Anastasia     yes   12.5
1         3       Dima      no    9.0
2         2  Katherine     yes   16.5
3         3      James      no    NaN
4         2      Emily      no    9.0
5         3    Michael     yes   20.0
6         1    Matthew     yes   14.5
7         1      Laura      no    NaN
8         2      Kevin      no    8.0
9         1      Jonas     yes   19.0

After removing first and second rows
   attempts       name qualify  score
2         2  Katherine     yes   16.5
3         3      James      no    NaN
4         2      Emily      no    9.0
5         3    Michael     yes   20.0
6         1    Matthew     yes   14.5
7         1      Laura      no    NaN
8         2      Kevin      no    8.0
9         1      Jonas     yes   19.0

Reset the Index:
   index  attempts       name qualify  score
0      2         2  Katherine     yes   16.5
1      3         3      James      no    NaN
2      4         2      Emily      no    9.0
3      5         3    Michael     yes   20.0
4      6         1    Matthew     yes   14.5
5      7         1      Laura      no    NaN
6      8         2      Kevin      no    8.0
7      9         1      Jonas     yes   19.0

 

Pandas Example – Write a Pandas program to reset index in a given DataFrame

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  • Practical Machine Learning:This is about querying databases, cleaning data, writing scripts to transform data and gluing algorithm and libraries together and writing custom code to squeeze reliable answers from data to satisfy difficult and ill defined questions. It’s the mess of reality.
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Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.
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