w3resource
Python Pandas Exercises

Pandas: Sort a given DataFrame by two or more columns

Pandas: DataFrame Exercise-50 with Solution

Write a Pandas program to sort a given DataFrame by two or more columns.

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("\nSort the above DataFrame on attempts, name:")
df = df.sort_values(['attempts', 'name'], ascending=[True, True])
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

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

Python Code Editor:


Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Pandas program to append data to an empty DataFrame.
Next: Write a Pandas program to convert the datatype of a given column (floats to ints).

What is the difficulty level of this exercise?



New Content: Composer: Dependency manager for PHP, R Programming


bedava porno