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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _apply_2d(self, func, axis):
 """ Handle 2-d slices, equiv to iterating over the other axis. """

        ndim = self.ndim
        axis = [self._get_axis_number(a) for a in axis]

        # construct slabs, in 2-d this is a DataFrame result
        indexer_axis = list(range(ndim))
        for a in axis:
            indexer_axis.remove(a)
        indexer_axis = indexer_axis[0]

        slicer = [slice(None, None)] * ndim
        ax = self._get_axis(indexer_axis)

        results = []
        for i, e in enumerate(ax):
            slicer[indexer_axis] = i
            sliced = self.iloc[tuple(slicer)]

            obj = func(sliced)
            results.append((e, obj))

        return self._construct_return_type(dict(results))