def raise_exception(self, excid=0):
        try:
            en,ev,etb,ei = self.elist[excid]
        except:
            raise IndexError(excid%"an exception with index %i does not exist")
        else:
            raise RemoteError(en, ev, etb, ei)
dataset/ETHPy150Open ipython/ipython-py3k/IPython/parallel/error.py/CompositeError.raise_exception/swapped operands of `%`