def METHOD_NAME(self):
    self._d['a'][
        'x', 1.5 * sc.units.dimensionless : 4.5 * sc.units.dimensionless
    ] = self._d['b']['x', 1:-1]
    assert self._d['a'].data.values.tolist() == [1.0, 2.0, 3.0, 4.0, 1.4]