code: def parsebytes(self, text, headersonly=False):
          
          text = text.decode('ASCII', errors='surrogateescape')
          return self.parser.parsestr(text, headersonly)
docs: Create a message structure from a byte string.
  
          Returns the root of the message structure.  Optional headersonly is a
          flag specifying whether to stop parsing after reading the headers or
          not.  The default is False, meaning it parses the entire contents of
          the file.