code: def read_short(self, unpacker=Struct('>H').unpack_from,
                     size=Struct('>H').size):
          
          self._check_underflow(size)
          rval = unpacker(self._input, self._pos)[0]
          self._pos += size
          return rval
docs: Read an unsigned 16-bit integer
  
          Will raise BufferUnderflow if there's not enough bytes in the buffer.
          Will raise struct.error if the data is malformed