Sai A Sai A
Updated date Aug 16, 2023
In this blog, we will learn different approaches to convert a list of strings to PascalCase in Python. Explore methods using loops, list comprehension, and even regular expressions.

Introduction:

In this blog, we will explore multiple methods to convert a list of strings to PascalCase using Python and provide sample codes and outputs.

Method 1: Using a For Loop

The simplest approach to convert a list of strings to PascalCase is by utilizing a for loop. Here's a Python program demonstrating this method:

def to_pascal_case(input_list):
    pascal_case_list = []
    for word in input_list:
        pascal_case_list.append(word.capitalize())
    return ''.join(pascal_case_list)

input_strings = ["hello", "world", "python", "programming"]
output_pascal_case = to_pascal_case(input_strings)
print("Method 1 Output:", output_pascal_case)

In this method, we define a function to_pascal_case that takes an input list of strings. We initialize an empty list pascal_case_list to store the capitalized words. We then iterate through each word in the input list using a for loop, capitalize each word using the capitalize() method, and append the capitalized word to the pascal_case_list. Finally, we use join() to concatenate the capitalized words and return the resulting PascalCase string.

Output:

Method 1 Output: HelloWorldPythonProgramming

Method 2: Using List Comprehension and Join

Another efficient way to achieve PascalCase conversion is by using list comprehension along with the join() method. Here's the code snippet:

def to_pascal_case(input_list):
    capitalized_words = [word.capitalize() for word in input_list]
    return ''.join(capitalized_words)

input_strings = ["hello", "world", "python", "programming"]
output_pascal_case = to_pascal_case(input_strings)
print("Method 2 Output:", output_pascal_case)

In this method, we use list comprehension to iterate through each word in the input list and capitalize it. The resulting list of capitalized words is then joined using the join() method to form the final PascalCase string.

Output:

Method 2 Output: HelloWorldPythonProgramming

Method 3: Using Regular Expressions

For more complex scenarios involving special characters or complex word separation, regular expressions can be employed to achieve PascalCase conversion. Here's a demonstration of this method:

import re

def to_pascal_case(input_list):
    combined_string = ''.join(input_list)
    pascal_case = re.sub(r'\b\w', lambda match: match.group().upper(), combined_string)
    return pascal_case

input_strings = ["hello", "world", "python", "programming"]
output_pascal_case = to_pascal_case(input_strings)
print("Method 3 Output:", output_pascal_case)

In this approach, we start by concatenating the input list of strings into a single string named combined_string. We then use the re.sub() function from the re module to apply a regular expression that matches the first character of each word (indicated by \b\w) and converts it to uppercase using a lambda function. This method can handle more complex cases where words are separated by non-alphanumeric characters.

Output:

Method 3 Output: HelloWorldPythonProgramming

Conclusion:

In this blog, we have explored multiple methods to convert a list of strings to PascalCase in Python. We started with a simple for loop, progressed to a more concise list comprehension approach, and finally introduced the use of regular expressions for handling complex cases.

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