TypeError: unicode strings are not supported, please encode to bytes: 'hu'

小鱼儿 2022-06-16 08:06 326阅读 0赞

1、错误描述

>>> t=serial.Serial("COM3",4800);
    >>> n=t.write('00000200=0000020');
    Traceback (most recent call last):
      File "<pyshell#5>", line 1, in <module>
        n=t.write('00000200=0000020');
      File "D:\Python\Python36\lib\site-packages\pyserial-3.3-py3.6.egg\serial\serialwin32.py", line 308, in write
        data = to_bytes(data)
      File "D:\Python\Python36\lib\site-packages\pyserial-3.3-py3.6.egg\serial\serialutil.py", line 63, in to_bytes
        raise TypeError('unicode strings are not supported, please encode to bytes: {!r}'.format(seq))
    TypeError: unicode strings are not supported, please encode to bytes: '00000200=0000020'
    >>> n=t.write('hu');
    Traceback (most recent call last):
      File "<pyshell#6>", line 1, in <module>
        n=t.write('hu');
      File "D:\Python\Python36\lib\site-packages\pyserial-3.3-py3.6.egg\serial\serialwin32.py", line 308, in write
        data = to_bytes(data)
      File "D:\Python\Python36\lib\site-packages\pyserial-3.3-py3.6.egg\serial\serialutil.py", line 63, in to_bytes
        raise TypeError('unicode strings are not supported, please encode to bytes: {!r}'.format(seq))
    TypeError: unicode strings are not supported, please encode to bytes: 'hu'
    >>>

2、错误原因

需要将传输的字符串添加encode()方法，需要对字符串进行编码

3、解决办法

>>> n=t.write('00000200=00000200'.encode());
    >>> print(t.portstr);
    COM3
    >>> print(n);
    17
    >>> s=t.read(n);
    print(s);