code: def readWord(self):
          
          word = unpack(self.endianness + ('H' if not self.signed else 'h'), self.readAt(self.offset, 2))[0]
          self.offset += 2
          return word
docs: Reads a word value from the L{ReadData} stream object.
          
          @rtype: int
          @return: The word value read from the L{ReadData} stream.