title: how to convert specific characters into string
body: <p>I'm wondering how to convert those type of characters into a string: \x0b , \0x07.</p>
  <p>To be clear, I'm using the base64 to decode a stream and then we will get those special characters. so my question is how to correct this code so I can get something correct:</p>
  <pre><code>encodedStr = 'somestring coded in base64'
  missing_padding = 4 - len(encodedStr) % 4
  if missing_padding:
      encodedStr += '=' * missing_padding
  decodedBytes = base64.b64decode(encodedStr)
  decodedStr = base64.b64decode(decodedBytes).decode('utf-8')
  print(decodedBytes)
  </code></pre>