def increment_eventually(self, n=1):
        with self._mutex:
            if self.value:
                self.value = self.value + max(n, 0)
        return self.value
We should be able to filter decimal fields using strings (#8023)
dataset/ETHPy150Open celery/kombu/kombu/common.py/QoS.increment_eventually--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/tests/regressiontests/model_fields/tests.py/DecimalFieldTests.test_filter_with_strings