title: Python: How to send a hexdecimal string through socket in Python3 without encoding it?
body: <p>I performed socket communication in python2, it worked well and I have to make it works in python3 again. I have tired str.encode() stuff with many formats, but the other side of the network can't recognize what I send. The only thing I know is that the python3 str type is encoded as Unicode uft-8 in default, and I'm pretty sure the critical question in here is that what is the format of python2 str type. I have to send exactly the same thing as what was stored in python2 str. But the tricky thing is the socket of python3 only sends the encoded unicode bytes or other buffer interface, rather than the str type with the raw data in Python2. The example is as follow:</p>
  
  <p>In python2:</p>
  
  <pre><code>data = 'AA060100B155'
  datasplit = [fulldata[i: i+2] for i in range(0, len(fulldata), 2)]
  senddata = ''
  for item in datasplit:
      itemdec = chr(int(item, 16))
      senddata += itemdec
  print(senddata) 
  #'\xaa\x06\x01\x00\xb1U',which is the data I need
  </code></pre>
  
  <p>In python3, seems it can only sends the encoded bytes using "senddata.encode()", but it is not the format I want. You can try:</p>
  
  <pre><code>print(senddata.encode('latin-1'))
  #b'\xaa\x06\x01\x01\xb2U'
  </code></pre>
  
  <p>to see the difference of two senddatas, and an interesting thing is that it is faulty encoded when using utf-8.</p>
  
  <p>The data stored in Python3 str type is the thing I need, but my question is how to send the data of that string without encoding it? Or how to perform the same str type of Python2 in Python3?</p>
  
  <p>Can anyone help me with this?</p>