Class Amount

test/ext/test_hybrid.py:2006–2051

        }

        class Amount:
            def __init__(self, amount, currency):
                self.currency = currency
                self.amount = amount

            def __add__(self, other):
                return Amount(
                    self.amount + other.as_currency(self.currency).amount,
                    self.currency,
                )

            def __sub__(self, other):
                return Amount(
                    self.amount - other.as_currency(self.currency).amount,
                    self.currency,
                )

            def __lt__(self, other):
                return self.amount < other.as_currency(self.currency).amount

            def __gt__(self, other):
                return self.amount > other.as_currency(self.currency).amount

            def __eq__(self, other):
                return self.amount == other.as_currency(self.currency).amount

            def as_currency(self, other_currency):
                return Amount(
                    currency_lookup[(self.currency, other_currency)]
                    * self.amount,
                    other_currency,
                )

            def __clause_element__(self):
                # helper method for SQLAlchemy to interpret
                # the Amount object as a SQL element
                if isinstance(self.amount, (float, int, Decimal)):
                    return literal(self.amount)
                else:
                    return self.amount

            def __str__(self):
                return "%2.4f %s" % (self.amount, self.currency)

            def __repr__(self):
                return "Amount(%r, %r)" % (self.amount, self.currency)

        Base = declarative_base()