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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 date_this_month(self, before_today=True, after_today=False):
 """ Gets a Date object for the current month. :param before_today: include days in current month before today :param after_today: include days in current month after today :param tzinfo: timezone, instance of datetime.tzinfo subclass :example DateTime('2012-04-04 11:02:02') :return DateTime """

        today = date.today()
        this_month_start = today.replace(day=1)

        next_month_start = this_month_start + \
            relativedelta.relativedelta(months=1)
        if before_today and after_today:
            return self.date_between_dates(this_month_start, next_month_start)
        elif not before_today and after_today:
            return self.date_between_dates(today, next_month_start)
        elif not after_today and before_today:
            return self.date_between_dates(this_month_start, today)
        else:
            return today