code: def amount(self, amount):
          
  
          if amount is None:
              raise ValueError("Invalid value for `amount`, must not be `None`")
          if amount < 0:
              raise ValueError("Invalid value for `amount`, must be a value greater than or equal to `0`")
  
          self._amount = amount
docs: Sets the amount of this Money.
          The amount of money, in the smallest denomination of the currency indicated by `currency`. For example, when `currency` is `USD`, `amount` is in cents.
  
          :param amount: The amount of this Money.
          :type: int