How to use the gtts.tokenizer.symbols function in gTTS

def abbreviations(text):
    """Remove periods after an abbreviation from a list of known
    abbrevations that can be spoken the same without that period. This
    prevents having to handle tokenization of that period.

    Note:
        Could potentially remove the ending period of a sentence.

    Note:
        Abbreviations that Google Translate can't pronounce without
        (or even with) a period should be added as a word substitution with a
        :class:`PreProcessorSub` pre-processor. Ex.: 'Esq.', 'Esquire'.

    """
    return PreProcessorRegex(
        search_args=symbols.ABBREVIATIONS,
        search_func=lambda x: r"(?<={})(?=\.).".format(x),
        repl='', flags=re.IGNORECASE).run(text)