code: def get_var_arr(self):
          ''' getter '''
          if isinstance(self.__var_arr, np.ndarray):
              return self.__var_arr
          else:
              raise TypeError(f get_var_arr(self):
          ''' getter '''
          if isinstance(self.__var_arr, np.ndarray):
              return self.__var_arr
          else:
              raise TypeError()
docs: getter