def test_copy(self):
        x = Bidict()
        x[1] = 2
        x[3] = 4
        y = copy.copy(x)
        assert y.inverse[4] == x.inverse[4]
        assert y.inverse[2] == x.inverse[2]
Return value is a scalar
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/data_structures/bijectivedict.py/TestBidict.test_copy--crossover with--dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/models/s3c.py/E_Step.energy_functional