code: def get_last_week_range(weekday_start="Sunday"):
      
      today = date.today()
      # Get the first day of the past complete week.
      start_of_week = snap_to_beginning_of_week(today, weekday_start) - timedelta(weeks=1)
      end_of_week = start_of_week + timedelta(days=6)
      return (start_of_week, end_of_week)
docs: Gets the date for the first and the last day of the previous complete week.
  
      :param weekday_start: Either "Monday" or "Sunday", indicating the first day of the week.
      :returns: A tuple containing two date objects, for the first and the last day of the week
                respectively.