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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 slice_shift(self, periods=1, axis=0):
 """ Equivalent to `shift` without copying data. The shifted data will not include the dropped periods and the shifted axis will be smaller than the original. Parameters periods : int Number of periods to move, can be positive or negative Returns ------- shifted : same type as caller Notes ----- While the `slice_shift` is faster than `shift`, you may pay for it later during alignment. """

        if periods == 0:
            return self

        if periods > 0:
            vslicer = slice(None, -periods)
            islicer = slice(periods, None)
        else:
            vslicer = slice(-periods, None)
            islicer = slice(None, periods)

        new_obj = self._slice(vslicer, axis=axis)
        shifted_axis = self._get_axis(axis)[islicer]
        new_obj.set_axis(shifted_axis, axis=axis, inplace=True)

        return new_obj.__finalize__(self)