noize-e

def normalize(obj, dict_key=None, regx="text"):
    """ This function cleans and normalize a given string. It performs three
        main operations: Sets to lower case, strips any trailing whitespace and
        finally substracts any character that isn't allowed in the string type
        regex, the character is replaced with an empty string.

        :param obj: this object can be 'str' or 'dict' instance type.
        :type obj:str It performs a directly normalization
        :type obj:dict It expects a key ( from 'dict_key' arg ) string
            to extract the string to be normalize, otherwise returns None.