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)