Pyserial 将字节转换为普通字符串 [英] Pyserial converting bytes to normal string

问题描述

我正在通过串行端口接收数据包，但是当我收到数据包时，它是字节类，如下所示:

b'>0011581158NNNNYNNN +6\r'

如何将其转换为普通字符串?当我尝试从这个字符串中获取信息时，它以十进制表示形式出现.

解决方案

您可以调用 decode 在 bytes 对象上将其转换为字符串，但只有当 bytes 对象实际表示文本时才有效:

<预><代码>>>>bs = b'>0011581158NNNNYNNN +6\r'>>>bs.decode('utf-8')'>0011581158NNNNYNNN +6\r'

要真正解析输入，您需要知道格式及其实际含义.为此，请识别连接到串行端口的设备(扫描仪?机器人?某种接收器?).并查找协议.在您的情况下，它可能是一个基于文本的协议，但您经常会发现字节代表数字，您可能需要查看 struct 模块.

I am receiving a packet through a serial port but when I receive the packet it is of class bytes and looks like this:

b'>0011581158NNNNYNNN  +6\r'

How do I convert this to a normal string? When I try to take information from this string, it comes out as a decimal representation it appears.

解决方案

You can call decode on the bytes object to convert it to a string, but that only works if the bytes object actually represents text:

>>> bs = b'>0011581158NNNNYNNN  +6\r'
>>> bs.decode('utf-8')
'>0011581158NNNNYNNN  +6\r'

To really parse the input, you need to know the format, and what it actually means. To do that, identify the device that is connected to the serial port (A scanner? A robot? A receiver of some kind?). And look up the protocol. In your case, it may be a text-based protocol, but you'll often find that bytes stand for digits, in which you'll probably want to have a look at the struct module.

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