code: def read_header(self):
          
          format = '!HHHHHH'
          length = struct.calcsize(format)
          info = struct.unpack(format,
                  self.data[self.offset:self.offset + length])
          self.offset += length
  
          self.id = info[0]
          self.flags = info[1]
          self.num_questions = info[2]
          self.num_answers = info[3]
          self.num_authorities = info[4]
          self.num_additionals = info[5]
docs: Reads header portion of packet