str_to_camel_case
===============================================

.. py:function:: petpal.utils.useful_functions.str_to_camel_case(input_str) -> str

   Take a string and return the string converted to camel case.

   Special characters (? * - _ / \) are removed and treated as word separaters. Different
   words are then capitalized at the first character, leaving other alphanumeric characters
   unchanged.

   :param input_str: The string to convert to camel case and remove special characters.
   :type input_str: str

   :returns: *camel_case_str (str)* --

             The string converted to camel case (e.g. CamelCase) with special
                 characters removed.