code: def set_var_arr(self, value):
          ''' setter '''
          if isinstance(value, np.ndarray):
              self.__var_arr = value
          else:
              raise TypeError(f set_var_arr(self, value):
          ''' setter '''
          if isinstance(value, np.ndarray):
              self.__var_arr = value
          else:
              raise TypeError()
docs: setter