code: def is_in_this_week(self):
          
          return self.is_date_in_between(
              Weekday.get_last(self.week_end, including_today=True),
              Weekday.get_next(self.week_end),
              include_end=False
          )
docs: Checks if date is in this week (from sunday to sunday)
  
          :return: True iff date is in this week (from sunday to sunday)