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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 timescales(self):
 r""" Relaxation timescales of the hidden transition matrix Returns ------- ts : ndarray(m) relaxation timescales in units of the input trajectory time step, :math:`\lambda_i` are the hidden transition matrix eigenvalues. """

        from msmtools.analysis.dense.decomposition import timescales_from_eigenvalues as _timescales

        self._ensure_spectral_decomposition()
        ts = _timescales(self._eigenvalues, tau=self._lag)
        return ts[1:]