Pandas DataFrame: Replace the ‘qualify' column contains the values 'yes' and 'no' with True and False
Pandas: DataFrame Exercise-17 with Solution
Write a Pandas program to replace the ‘qualify' column contains the values 'yes' and 'no' with True and False.
Sample DataFrame:
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']}
labels = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']
Values for each column will be:
name : ‘Suresh’, score: 15.5, attempts: 1, qualify: ‘yes’, label: ‘k’
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']}
labels = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']
df = pd.DataFrame(exam_data , index=labels)
print("Original rows:")
print(df)
print("\nReplace the 'qualify' column contains the values 'yes' and 'no' with True and False:")
df['qualify'] = df['qualify'].map({'yes': True, 'no': False})
print(df)
Sample Output:
Original rows: attempts name qualify score a 1 Anastasia yes 12.5 b 3 Dima no 9.0 c 2 Katherine yes 16.5 d 3 James no NaN e 2 Emily no 9.0 f 3 Michael yes 20.0 g 1 Matthew yes 14.5 h 1 Laura no NaN i 2 Kevin no 8.0 j 1 Jonas yes 19.0 Replace the 'qualify' column contains the values 'yes' and 'no' with T rue and False: attempts name qualify score a 1 Anastasia True 12.5 b 3 Dima False 9.0 c 2 Katherine True 16.5 d 3 James False NaN e 2 Emily False 9.0 f 3 Michael True 20.0 g 1 Matthew True 14.5 h 1 Laura False NaN i 2 Kevin False 8.0 j 1 Jonas True 19.0
Explanation:
The above code first creates a pandas DataFrame from the ‘exam_data’ dictionary and assigns index labels to each row.
df['qualify'] = df['qualify'].map({'yes': True, 'no': False}): This line maps the values of the 'qualify' column to True and False based on whether the value is 'yes' or 'no', respectively.
Finally print(df) function prints the resulting DataFrame.
Python-Pandas Code Editor:
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Previous: Write a Pandas program to sort the data frame first by 'name' in descending order, then by 'score' in ascending order.
Next: Write a Pandas program to change the name 'James' to 'Suresh' in name column of the data frame.
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