code: def set_time_rate(self, value):
          '''
          setter
          Time rate.
          '''
          if isinstance(value, float) is False:
              raise TypeError("The type of __time_rate must be float.")
  
          if value <= 0.0:
              raise ValueError("The value of __time_rate must be greater than 0.0")
  
          self.__time_rate = valuf set_time_rate(self, value):
          '''
          setter
          Time rate.
          '''
          if isinstance(value, float) is False:
              raise TypeError("The type of __time_rate must be float.")
  
          if value <= 0.0:
              raise ValueError("The value of __time_rate must be greater than 0.0")
  
          self.__time_rate = value
docs: setter
          Time rate.