def distance_gps2(GPS, GPS2):
    '''distance between two points'''
    if GPS.TimeMS != GPS2.TimeMS:
        # reject messages not time aligned
        return None
    return distance_two(GPS, GPS2)
def distance_gps2 ( GPS , GPS2 ) : if GPS . TimeMS != GPS2 . TimeMS : return None return distance_two ( GPS , GPS2 )
distance between two points