如何在 Python 3.7 中向 bytearray 添加字节？

Question

我是 Python 3.7 的新手，我正在尝试使用以下代码从串口读取字节。我正在使用 pySerial 模块和 read() 函数 returns bytes。

self.uart = serial.Serial()
self.uart.port = '/dev/tty/USB0'
self.uart.baudrate = 115200
self.uart.open()
# buffer for received bytes
packet_bytes = bytearray()
# read and process data from serial port
while True:
    # read single byte from serial port
    current_bytes = self._uart.read()
    if current_bytes is B'$':
        self.process_packet(packet_bytes)
        packet_bytes = bytearray()
    else:
        packet_bytes.append(current_bytes)        <- Error occurs here

我收到以下错误：

TypeError: an integer is required

一些想法如何解决？

Answer 1

packet_bytes += bytearray(current_bytes)

Answer 2

我自己最近也遇到了这个问题，这对我有用。我没有实例化字节数组，而是将缓冲区初始化为字节对象：

buf = b""    #Initialize byte object

  poll = uselect.poll()
  poll.register(uart, uselect.POLLIN)

  while True:
    ch = uart.read(1) if poll.poll() else None

    if ch == b'x':
      buf += ch       #append the byte character to the buffer

    if ch == b'y':
      buf = buf[:-1]  #remove the last byte character from the buffer

    if ch == b'5': ENTER
      break

如何在 Python 3.7 中向 bytearray 添加字节？

How to add bytes to bytearray in Python 3.7?

python

arrays

pyserial

python-3.x