date_list = []    begin_date = datetime.datetime.strptime(begin_date, "%Y-%m-%d")    end_date = datetime.datetime.strptime(end_date, "%Y-%m-%d")    while begin_date <= end_date:        date_str = begin_date.strftime("%m-%d")        date_list.append(date_str)        begin_date += datetime.timedelta(days=1)    print date_list