Pandas Data Series: Convert the first and last character of each word to upper case

Last update on April 03 2025 13:11:47 (UTC/GMT +8 hours)

24. Capitalize Boundaries

Write a Pandas program convert the first and last character of each word to upper case in each word of a given series.

Sample Solution :

Python Code :

import pandas as pd
series1 = pd.Series(['php', 'python', 'java', 'c#'])
print("Original Series:")
print(series1)
result = series1.map(lambda x: x[0].upper() + x[1:-1] + x[-1].upper())
print("\nFirst and last character of each word to upper case:")
print(result)

Sample Output:

Original Series:
0       php
1    python
2      java
3        c#
dtype: object

First and last character of each word to upper case:
0       PhP
1    PythoN
2      JavA
3        C#
dtype: object

Explanation:

series1 = pd.Series(['php', 'python', 'java', 'c#']): This line creates a Pandas Series object 'series1' containing four strings representing different programming languages.

result = series1.map(lambda x: x[0].upper() + x[1:-1] + x[-1].upper()): This line applies a lambda function to each element of the Pandas Series object 'series1' using the .map() method. The lambda function takes a string x, capitalizes the first and last character of the string using string indexing, and returns the modified string.

For more Practice: Solve these Related Problems:

• Write a Pandas program to convert the first and last characters of each string in a Series to uppercase and reverse the string.
• Write a Pandas program to capitalize only the first and last letters of each word in a Series and then sort the Series.
• Write a Pandas program to transform a Series by converting the first and last characters of words to uppercase and adding a prefix.
• Write a Pandas program to modify a Series of words by capitalizing the first and last letters only if the word length is greater than 3.

Python-Pandas Code Editor:

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