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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def parse( self, time, # type: str fmt, # type: str now, # type: pendulum.DateTime locale=None, # type: typing.Union[str, None] """ Parses a time string matching a given format as a tuple. :param time: The timestring :param fmt: The format :param now: The datetime to use as "now" :param locale: The locale to use :return: The parsed elements """

        escaped_fmt = re.escape(fmt)

        tokens = self._FROM_FORMAT_RE.findall(escaped_fmt)
        if not tokens:
            return time

        if not locale:
            locale = pendulum.get_locale()

        locale = Locale.load(locale)

        parsed = {
            "year": None,
            "month": None,
            "day": None,
            "hour": None,
            "minute": None,
            "second": None,
            "microsecond": None,
            "tz": None,
            "quarter": None,
            "day_of_week": None,
            "day_of_year": None,
            "meridiem": None,
            "timestamp": None,
        }

        pattern = self._FROM_FORMAT_RE.sub(
            lambda m: self._replace_tokens(m.group(0), locale), escaped_fmt
        )

        if not re.match(pattern, time):
            raise ValueError("String does not match format {}".format(fmt))

        re.sub(pattern, lambda m: self._get_parsed_values(m, parsed, locale, now), time)

        return self._check_parsed(parsed, now)