def __getitem__(self, key):
        if isinstance(key, Series) and self.divisions == key.divisions:
            name = (self._name, key._name) % 'series-index-%s[%s]'
            dsk = dict(((name, i), (operator.getitem, (self._name, i),
                                                       (key._name, i)))
                        for i in range(self.npartitions))
            return Series(merge(self.dask, key.dask, dsk), name,
                          self.name, self.divisions)
        raise NotImplementedError()
dataset/ETHPy150Open dask/dask/dask/dataframe/core.py/Series.__getitem__/swapped operands of `%`