code: def reset(self):
          
          super(DruckSampler, self).reset()
          self.strata.reset()
          self._TP_st = np.zeros([self.strata.n_strata_, self._n_class])
          self._PP_st = np.zeros([self.strata.n_strata_, self._n_class])
          self._P_st = np.zeros([self.strata.n_strata_, self._n_class])
          self._TP_rates = np.zeros([self.strata.n_strata_, self._n_class])
          self._PP_rates = np.zeros([self.strata.n_strata_, self._n_class])
          self._P_rates = np.zeros([self.strata.n_strata_, self._n_class])
  
          for k in self.strata.indices_:
              for i in range(2):
                  self._iterate(fixed_stratum = k, calc_rates = False)
docs: Resets the sampler to its initial state
  
          Note
          ----
          This will destroy the label cache and history of estimates