def sm_flow_1(self):
        return (self.input()- self.sm_stock_1())/self.per_stock_adjustment_time()
Just like self.assert_(a not in b), but with a nicer default message.
dataset/ETHPy150Open JamesPHoughton/pysd/tests/old_tests/vensim/test_smooth.py/Components.sm_flow_1--crossover with--dataset/ETHPy150Open baz/app-sales-machine/lib/graphy/graphy_test.py/GraphyTest.assertNotIn