Python f string none value shows as 'None' in string

return_nothing_if_none.py

    def rnn(i: str) -> str:
        """
        Python hack. In f-strings, python will interpret '' or "" as "None" instead of, well None, and
        thus you get None in text which helps nobody in url strings.  This uses an iterator join on a
        list comprehension to ensure we return no text at all if the value is none.  Thanks python.

        :param i: String that may be None or "" or an actual value
        :type i: str
        :return: the text if it is there else, specifically '' (not None or null like object)
        :rtype: str
        """
        return ''.join(a for a in {i} if i)