Typeerror:unicode strings are not supported, please encode to bytes: ' Hu '

1. Error description

>>> 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. Error reason

You need to add the transmitted string to the encode () method, and you need to encode the string

3. Solutions

>>> n=t.write (' 00000200=00000200 '. Encode ());
>>> print (T.PORTSTR);
COM3
>>> print (n);
>>> s=t.read (n);
print (s);