Message def get_change_point(start_date, end_date):

def get_change_point(start_date, end_date): change_points = [] for dt in rrule.rrule(rrule.MONTHLY, dtstart=start_date, until=end_date): last_day = list(monthrange(dt.year, dt.month)) for value in range((last_day[1]-15), (last_day[1]+1)): add_date = datetime(dt.year, dt.month, value) change_points.append(add_date) return change_points