nfc_.py 文件源码

def __init__(self):
        if sys.platform.startswith('win'):
             ports = ['COM%s' % (i + 1) for i in range(256)]
        elif sys.platform.startswith('linux') or sys.platform.startswith('cygwin'):
            # this excludes your current terminal "/dev/tty"
            ports = glob.glob('/dev/tty[A-Za-z]*')
        elif sys.platform.startswith('darwin'):
            ports = glob.glob('/dev/tty.*')
        else:
            raise EnvironmentError('Unsupported platform')
        self.result = []
        for port in ports:
            try:
                s = serial.Serial(port)
                s.close()
                self.result.append(port)
            except (OSError, serial.SerialException):
                pass