04-building-a-case-converter.py

"""
This is a simple case converter that converts PascalCase or camelCase strings to snake_case.
It uses a list comprehension to iterate through each character in the input string.
"""

def convert_to_snake_case(pascal_or_camel_cased_string):
    # snake_cased_char_list = []
    # for char in pascal_or_camel_cased_string:
    #     if char.isupper():
    #         converted_character = '_' + char.lower()
    #         snake_cased_char_list.append(converted_character)
    #     else:
    #         snake_cased_char_list.append(char)
    # snake_cased_string = ''.join(snake_cased_char_list)
    # clean_snake_cased_string = snake_cased_string.strip('_')

    # return clean_snake_cased_string

    snake_cased_char_list = [
        '_' + char.lower() if char.isupper()
        else char
        for char in pascal_or_camel_cased_string
    ]

    return ''.join(snake_cased_char_list).strip('_')


def main():
    print(convert_to_snake_case('IAmAPascalCasedString'))



if __name__=='__main__':
    main()