Python-сообщество

import serial
ser = serial.Serial('COM3', 115200,timeout = 1, xonxoff=True, dsrdtr = True, interCharTimeout = True) # otkroem port
ser.write('$CMD,CLEAR\r\n') # komanda "holodnij start"
i = p = l = E = h = q = SunTime = 0
s = y = ''
b = ser.readline() + ','
while l != 3: # kolichestvo perezapuskov programmi
    while i < 10: # ustanovim maksimaljnoe chislo issleduemih strok
       if p != len(b): 
        for x in b: # nachnjom rabotu s vibrannoi strokoi
            if b[0:5] == '$GPGGA': # ishem ctroku, nachinajushujusja s GPGGA
                                i = i + 1 # stchotchik strok
                                h = h + 1 # stchotchik vremeni, stroka GPGGA pojavljaetsja raz v sekundu
                                for x in b:
                                     if b[p] != ',':
                                         s = s + b[p] # videlenie pokazanij mejdu zapjatimi
                                         p = p + 1 # nomer simvola v stroke
                                     else:
                                         y = y + s + ','
                                         p = len(y)
                                         q = q + 1
                                         if q == 7 :      # iskomoe chislo pered 7j zapjatoj
                                              g = float(s)
                                              if g == 1:
                                                  E = h       
                                                  b = ser.readline() + ','
                                                  i = 0    
                                                  s = y = ''        
                                                  p = 0         

            else:
                b = ser.readline() + ',' # esli stroka nacinetsja ne s $GPGGA delaem perevod na sledujuschuju stroku
                i = i + 1
                         
                  
       else:
           
         q = 0 # obnuljaem stchotchik zapjatih
         s = y = ''        
           

         b = ser.readline() + ','
    h = 0 # obnuljaem vremja     
    SunTime = SunTime + E   # nakaplivaem vremja do pojavkenija edinici    
    l = l + 1    # stchiotchik perezapuskov programmi
    ser.write('$CMD,CLEAR\r\n') # i snova pocilaem komandu "holodnij start"
print 'srednee vremja obnarujenija sputnikov :',  float(SunTime)/l
ser.close()

while 1 != 3:

....
b = ser.readline() + ','
    ....
    for x in b: # nachnjom rabotu s vibrannoi strokoi
         ....
         for x in b:
                ...
                b = ser.readline() + ','
         ...
         b = ser.readline() + ',' # esli stroka nacinetsja ne s $GPGGA delaem perevod na sledujuschuju stroku

def get_some_value( ser, timeout ):
    expire = time.time() + timeout
    while time.time() < expire:
       line = ser.readline()
       values = line.split( "," )
       if values[ 0 ] == "$GPGGA":
            return int( values[ 6 ] )
    raise Exception( "Timeout" )