def coords_to_str(coords):
    """ Takes a list of GPSCoord and returns a pretty printed string
    """
    i,s = 0,""
    for coord in coords:
        if i>0: s += "\n"
        s += "%d - coord(%2.6f,%2.6f,%2.6f)" % \
                (i,coord.lat,coord.lon,coord.alt)
        i += 1
    return s