How to Convert Snake case to Pascal case in Python

Submitted by razormist on Monday, May 5, 2025 - 23:24.

In this tutorial, we will learn how to program "How to Convert Snake Case to Pascal Case in Python." The objective is to convert snake_case into PascalCase. This tutorial will guide you through the process step by step, showing you how to convert cases in your code. By the end, you will have a clear understanding of how to efficiently complete this task in Python.

This topic is straightforward to understand. Just follow the instructions I provide, and you will complete it with ease. The program I will demonstrate will show you the correct and efficient way to convert snake case to Pascal case. So, let’s dive into the coding process.

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

import re
 
while True:
    print("\n============= Convert Snake case to Pascal case =============\n")
 
    my_string= "i_love_sourcecodester"
 
    print("Snake Case: ",my_string)
    
    res= re.sub(r"(^|_)([a-z])", lambda match: match.group(2).upper(), my_string)
 
    print("\nPascal Case: ", res)
 
    opt = input("\nDo you want to try again?(yes/no): ")
       
    if opt.lower() == 'yes':
        ret=False
    elif opt.lower() == 'no':
        ret=True
        print("Exiting program....")
    else:
        print("Please enter yes/no:")
        break
 
    if ret == False:
        continue

This Python program converts a snake_case string into PascalCase using regular expressions. It identifies underscores followed by lowercase letters and capitalizes the letter while removing the underscore, resulting in a PascalCase formatted string.

Output:

There you have it we successfully created How to Convert Snake case to Pascal case in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

More Tutorials for Python Language

Python Tutorials

How to Convert Snake case to Pascal case in Python

Getting Started:

Creating Main Function

Output:

Add new comment