PYTHON

camel case in python

>>> "they're bill's friends from the UK".title()
"They'Re Bill'S Friends From The Uk"

python snake case to camel case

def convert_snake_to_camel(key: str) -> str:
    """
    Coerce snake case to camel case

	Use split with destructuring to grab first word and store rest in list.
    map over the rest of the words passing them to str.capitalize(), 
    destructure map list elements into new list with first word at front, and
    finally join them back to a str.
    
    Note: may want to use `str.title` instead of `str.capitalize`

    :param key: the word or variable to convert
    :return str: a camel cased version of the key
    """

    first, *rest = key.split('_')

    camel_key: list = [first.lower(), *map(str.capitalize, rest)]

    return ''.join(camel_key)
 

camel case to snake case python

import re

name = 'CamelCaseName'
name = re.sub(r'(?<!^)(?=[A-Z])', '_', name).lower()
print(name)  # camel_case_name