やりたい事４：電力レポートをメール送信する

#==============================================================

def send_email():

    try:

       #=================================

       # 昨日の時間範囲

       #=================================

       post_datetime = datetime.datetime.now()

       post_datetime = post_datetime + timedelta(hours=9)

       post_datetime_s = datetime.datetime(post_datetime.year, post_datetime.month, post_datetime.day,0,0,0,0)

       post_datetime_s = post_datetime_s - timedelta(hours=24)

       post_datetime_e = post_datetime_s + timedelta(hours=24)

       post_datetime_s = post_datetime_s - timedelta(hours=9)

       post_datetime_e = post_datetime_e - timedelta(hours=9)

       sql = ("SELECT * FROM ListHour WHERE date_time >= DATETIME('%s') AND date_time < DATETIME('%s') ORDER BY date_time ASC" % (post_datetime_s, post_datetime_e))

       power_consumption = db.GqlQuery(sql)

       power_consumption = power_consumption.fetch(60)

       out_power = []

       gen_watt_total = 0

       use_watt_total = 0

       txt = ""

       for fav in power_consumption:

           gen_watt = fav.watt_value1

           use_watt = fav.watt_value1 + fav.watt_value2

           gen_watt_total = gen_watt_total + gen_watt

           use_watt_total = use_watt_total + use_watt

           txt = txt + (fav.date_time + timedelta(hours=9)).strftime("%Y/%m/%d %H:%M") + ',' + str(gen_watt / fav.write_cnt) + ',' + str(use_watt / fav.write_cnt) + '\r\n'

       gen_watt_total = float(gen_watt_total) / (30.0 * 1000.0)

       use_watt_total = float(use_watt_total) / (30.0 * 1000.0)

       sender_address = "メールアドレス"

       subject = u"電力計測結果" + post_datetime_s.strftime(" %Y/%m/%d")

       body = u'昨日の電力量の結果を送信します。\n\n'

       body += u'総発電電力：' + str.format('{0:03.2f}', gen_watt_total) + u'kWh\n'

       body += u'総使用電力：' + str.format('{0:03.2f}', use_watt_total) + u'kWh\n'

       mail.send_mail(sender=sender_address,

                  to=sender_address,

                  subject=subject,

                  body=body,

                  attachments=[post_datetime_s.strftime("watt_%Y_%m_%d") + '.txt', txt])

    except:

       logging.error("send mail error")

       logging.error(traceback.format_exc())

sender_address = "メールアドレス"