def _validate_quote_char(in_quote_char):
    """
    Validator function for the quote character command line argument
    :param in_quote_char: The input quote character (str)
    :return:              The quote character       (str)
    """
    if in_quote_char is not None and in_quote_char.lower() == "none":
        return None
    else:
        return in_quote_char