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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 set_dtreat_interpt(self, t=None):
 """ Set the time vector on which to interpolate the data """

        if t is not None:
            t = np.unique(np.asarray(t, dtype=float).ravel())
        self._dtreat['interp-t'] = t