snake_case_to_camel_pascal_case.py

defsnake_to_camel_case(input_str: str, use_pascal: bool=False) ->str:
"""
 Transforms a snake_case given string to camelCase (or PascalCase if indicated)
 (defaults to not use Pascal)

 >>> snake_to_camel_case("some_random_string")
 'someRandomString'

 >>> snake_to_camel_case("some_random_string", use_pascal=True)
 'SomeRandomString'

 >>> snake_to_camel_case("some_random_string_with_numbers_123")
 'someRandomStringWithNumbers123'

 >>> snake_to_camel_case("some_random_string_with_numbers_123", use_pascal=True)
 'SomeRandomStringWithNumbers123'

 >>> snake_to_camel_case(123)
 Traceback (most recent call last):
 ...
 ValueError: Expected string as input, found <class 'int'>

 >>> snake_to_camel_case("some_string", use_pascal="True")
 Traceback (most recent call last):
 ...
 ValueError: Expected boolean as use_pascal parameter, found <class 'str'>
 """

ifnotisinstance(input_str, str):
msg=f"Expected string as input, found {type(input_str)}"
raiseValueError(msg)
ifnotisinstance(use_pascal, bool):
msg=f"Expected boolean as use_pascal parameter, found {type(use_pascal)}"
raiseValueError(msg)

words=input_str.split("_")

start_index=0ifuse_pascalelse1

words_to_capitalize=words[start_index:]

capitalized_words= [word[0].upper() +word[1:] forwordinwords_to_capitalize]

initial_word=""ifuse_pascalelsewords[0]

return"".join([initial_word, *capitalized_words])


if__name__=="__main__":
fromdoctestimporttestmod

testmod()