How to use the futures.models.Wallet.objects.get function in futures

history = FutureHistory.objects.filter(future=future)
        self.assertEqual(history.count(), 2)
        self.assertEqual(history[0].price, 275)
        self.assertEqual(history[1].price, 100)  # Got the highest then lowest.
        transactions = SuccessfulTransaction.objects.filter(future=future)
        self.assertEqual(transactions.count(), 2)
        self.assertTrue(self.compare_transactions(
            transactions[0], SuccessfulTransaction(
                buyer=order_1.creator, seller=user, future=future,
                quantity=15, unit_price=275)))
        self.assertTrue(self.compare_transactions(
            transactions[1], SuccessfulTransaction(
                buyer=order_2.creator, seller=user, future=future,
                quantity=75, unit_price=100)))
        # Wallets
        wallet = Wallet.objects.get(user=user)
        wallet_1 = Wallet.objects.get(user=order_1.creator)
        wallet_2 = Wallet.objects.get(user=order_2.creator)
        key = '%s' % future.pk
        self.assertEqual(json.loads(wallet.shares_owned)[key], 5)
        self.assertEqual(json.loads(wallet_1.shares_owned)[key], 15)
        self.assertEqual(json.loads(wallet_2.shares_owned)[key], 75)
        self.assertEqual(json.loads(wallet.shares_owned)['1'], 7)  # Unchanged.
        self.assertEqual(wallet.points, 10000 + (15 * 275) + (75 * 100))
        self.assertEqual(wallet_1.points, 10000 - (15 * 275))
        self.assertEqual(wallet_2.points, 10000 - (75 * 100))
        self.assertEqual(wallet.frozen, 0)
        self.assertEqual(wallet_1.frozen, 0)
        self.assertEqual(wallet_2.frozen, 0)

def test_order_5(self):
        """
            A regular sell to multiple people, with some stock still left over.
        """
        user = User.objects.get(pk=1)
        wallet = Wallet.objects.get(user=user)
        wallet.shares_owned = """{"4": 95, "1": 7}"""
        future = Future.objects.get(pk=4)
        # Sell 93 shares at 95 each.
        response = process_order(93, 95, wallet, 'sell', future)
        # Someone wants to buy 75@100, 15@275
        order = Order.objects.all().order_by('-pk')[0]  # My sell.
        order_1 = Order.objects.get(pk=11)  # 15@275
        order_2 = Order.objects.get(pk=5)   # 75@100
        self.assertEqual(order_1.filled, True)
        self.assertEqual(order_2.filled, True)
        self.assertEqual(order.filled, False)
        self.assertEqual(order.quantity, 3)
        self.assertEqual(order_1.filled_by, user)
        self.assertEqual(order_2.filled_by, user)
        future = Future.objects.get(pk=4)
        self.assertEqual(future.last_buy, 100)

def test_order_2(self):
        """
            Test that orders are prioritized by price then chronologically.
        """
        user = User.objects.get(pk=8)
        wallet = Wallet.objects.get(user=user)
        # Want to buy future "Jesse Day".
        # There is a sell order of 8 for 600, a buy order of 4 for 100,
        # a sell order of 4 for 325, a buy order of 4 for 275 in the fixture.
        future = Future.objects.get(pk=4)
        response = process_order(4, 600, wallet, 'buy', future)
        # Get my order
        order = Order.objects.all().order_by('-pk')[0]
        self.assertEqual(order.filled, True)
        self.assertEqual(order.unit_price, 600)  # Unchanged
        # Get the matching orders.
        order_1 = Order.objects.get(pk=9)  # The 325 S
        order_2 = Order.objects.get(pk=3)  # The 650 S
        self.assertEqual(order_1.filled, True)
        self.assertEqual(order_2.filled, False)
        self.assertEqual(order_1.filled_by, user)

future = Future.objects.get(pk=1)
        self.assertEqual(future.last_buy, 155)
        self.assertEqual(future.ask, 600)
        self.assertEqual(future.bid, 155)
        self.assertEqual(future.volume, 4)
        history = FutureHistory.objects.filter(future=future)
        self.assertEqual(history.count(), 1)
        self.assertEqual(history[0].price, 155)
        transactions = SuccessfulTransaction.objects.filter(future=future)
        self.assertEqual(transactions.count(), 1)
        self.assertTrue(self.compare_transactions(
            transactions[0], SuccessfulTransaction(
                buyer=order_1.creator, seller=user, future=future,
                quantity=4, unit_price=155)))
        # Wallets
        wallet = Wallet.objects.get(user=user)
        wallet_1 = Wallet.objects.get(user=order_1.creator)
        key = '%s' % future.pk
        self.assertEqual(json.loads(wallet.shares_owned)[key], 3)
        self.assertEqual(json.loads(wallet_1.shares_owned)[key], 4)
        self.assertEqual(json.loads(wallet.shares_owned)['4'], 10) # Unchanged.
        self.assertEqual(wallet_1.points, 10000 - (4 * 155))
        self.assertEqual(wallet.points, 10000 + (4 * 155))
        self.assertEqual(wallet.frozen, 0)
        self.assertEqual(wallet_1.frozen, 0)

self.assertEqual(history[1].price, 600)
        transactions = SuccessfulTransaction.objects.filter(future=future)
        self.assertEqual(transactions.count(), 2)

        self.assertTrue(self.compare_transactions(
            transactions[0], SuccessfulTransaction(
                buyer=user, seller=order_1.creator, future=future,
                quantity=4, unit_price=325)))
        self.assertTrue(self.compare_transactions(
            transactions[1], SuccessfulTransaction(
                buyer=user, seller=order_2.creator, future=future,
                quantity=8, unit_price=600)))
        # Wallets.
        wallet = Wallet.objects.get(user=user)
        wallet_1 = Wallet.objects.get(user=order_1.creator)
        wallet_2 = Wallet.objects.get(user=order_2.creator)
        key = '%s' % future.pk
        self.assertEqual(json.loads(wallet.shares_owned)[key], 12)
        self.assertEqual(wallet.points, 10000 - (4 * 325 + 8 * 600))
        self.assertEqual(wallet_1.points, 10000 + (4 * 325))
        self.assertEqual(wallet_2.points, 10000 + (8 * 600))

def test_order_4(self):
        """
            Regular sell.
        """
        user = User.objects.get(pk=1)
        wallet = Wallet.objects.get(user=user)
        wallet.shares_owned = """{"1": 7, "4": 10}"""
        future = Future.objects.get(pk=1)
        response = process_order(4, 150, wallet, 'sell', future)
        # Someone wants to buy 10@155
        order = Order.objects.all().order_by('-pk')[0]
        order_1 = Order.objects.get(pk=1) # Buy 10@155
        self.assertEqual(order_1.filled, False)
        self.assertEqual(order.filled, True)
        self.assertEqual(order_1.quantity, 6)
        self.assertEqual(order.filled_by, order_1.creator)
        future = Future.objects.get(pk=1)
        self.assertEqual(future.last_buy, 155)
        self.assertEqual(future.ask, 600)
        self.assertEqual(future.bid, 155)
        self.assertEqual(future.volume, 4)
        history = FutureHistory.objects.filter(future=future)

self.assertEqual(history[0].price, 325)
        self.assertEqual(history[1].price, 600)
        transactions = SuccessfulTransaction.objects.filter(future=future)
        self.assertEqual(transactions.count(), 2)

        self.assertTrue(self.compare_transactions(
            transactions[0], SuccessfulTransaction(
                buyer=user, seller=order_1.creator, future=future,
                quantity=4, unit_price=325)))
        self.assertTrue(self.compare_transactions(
            transactions[1], SuccessfulTransaction(
                buyer=user, seller=order_2.creator, future=future,
                quantity=8, unit_price=600)))
        # Wallets.
        wallet = Wallet.objects.get(user=user)
        wallet_1 = Wallet.objects.get(user=order_1.creator)
        wallet_2 = Wallet.objects.get(user=order_2.creator)
        key = '%s' % future.pk
        self.assertEqual(json.loads(wallet.shares_owned)[key], 12)
        self.assertEqual(wallet.points, 10000 - (4 * 325 + 8 * 600))
        self.assertEqual(wallet_1.points, 10000 + (4 * 325))
        self.assertEqual(wallet_2.points, 10000 + (8 * 600))