code: def readDword(self):
          
          dword = unpack(self.endianness + ('L' if not self.signed else 'l'), self.readAt(self.offset,  4))[0]
          self.offset += 4
          return dword
docs: Reads a dword value from the L{ReadData} stream object.
          
          @rtype: int
          @return: The dword value read from the L{ReadData} stream.