code: def cumulative_hazard_at_times(self, times, label=None):
          
          label = coalesce(label, self._label)
          return pd.Series(self._cumulative_hazard(self._fitted_parameters_, times), index=_to_array(times), name=label)
docs: Return a Pandas series of the predicted cumulative hazard value at specific times.
  
          Parameters
          -----------
          times: iterable or float
            values to return the cumulative hazard at.
          label: string, optional
            Rename the series returned. Useful for plotting.
  
          Returns
          --------
          pd.Series