How to use the quantulum3.regex.unicode_fractions function in quantulum3

def get_values(item, lang="en_US"):
    """
    Extract value from regex hit.
    """

    def callback(pattern):
        return " %s" % (reg.unicode_fractions()[pattern.group(0)])

    fracs = r"|".join(reg.unicode_fractions())

    value = item.group("value")
    # Remove grouping operators
    value = re.sub(
        r"(?<=\d)[%s](?=\d{3})" % reg.grouping_operators_regex(lang), "", value
    )
    # Replace unusual exponents by e (including e)
    value = re.sub(
        r"(?<=\d)(%s)(e|E|10)\^?" % reg.multiplication_operators_regex(lang), "e", value
    )
    # calculate other exponents
    value, factors = resolve_exponents(value)
    _LOGGER.debug("After exponent resolution: {}".format(value))

    value = re.sub(fracs, callback, value, re.IGNORECASE)

def callback(pattern):
        return " %s" % (reg.unicode_fractions()[pattern.group(0)])