test_pfunc.py 文件源码

def test_no_aliasing_2(self):
        # B and A take one another's values
        # no copying is necessary since each one is updated.
        orig_a = numpy.zeros((2, 2)) + .5
        orig_b = numpy.zeros((2, 2)) - .5
        A = self.shared(orig_a)
        B = self.shared(orig_b)

        data_of_a = data_of(A)
        data_of_b = data_of(B)

        f = pfunc([], [], updates=[(A, B), (B, A)])
        f()
        # correctness
        assert numpy.all(data_of(A) == -.5)
        assert numpy.all(data_of(B) == +.5)

        # shared vars may not be aliased
        assert not numpy.may_share_memory(data_of(A), data_of(B))

        # theano should have been smart enough to not make copies
        assert numpy.may_share_memory(data_of(A), data_of_b)
        assert numpy.may_share_memory(data_of(B), data_of_a)