Load the commodities for Amounts in this object.

def load_commodities(self):
        """
        Load the commodities for Amounts in this object.
        """
        base, quote = self.market.split("_")
        if isinstance(self.price, Amount):
            self.price = Amount("{0:.8f} {1}".format(self.price.to_double(), quote))
        else:
            self.price = Amount("{0:.8f} {1}".format(self.price, quote))
        if isinstance(self.amount, Amount):
            self.amount = Amount("{0:.8f} {1}".format(self.amount.to_double(), base))
        else:
            self.amount = Amount("{0:.8f} {1}".format(self.amount, base))
        if isinstance(self.exec_amount, Amount):
            self.exec_amount = Amount("{0:.8f} {1}".format(self.exec_amount.to_double(), base))
        else:
            self.exec_amount = Amount("{0:.8f} {1}".format(self.exec_amount, base))