import time, serial, micropyGPS, csv
gps = micropyGPS.MicropyGPS (9, 'dd')
#function------------------------------------------------ ------
def rungps ():
    s = serial.Serial ('/dev/serial0', 9600, timeout = 10)
    s.readline ()
    while True:
        sentence = s.readline (). decode ('utf-8')
        if sentence[0] != '$':
            continue
        for x in sentence:
            gps.update (x)
            if gps.clean_sentences > 20: # ちゃんとしたデーターがある程度たまったら出力する
                print ('% 2.8f,% 2.8f'% (gps.latitude [0], gps.longitude [0]))
                time.sleep (1.0)
rungps ()