test_link.py 文件源码

def test_sort_schedule_fn():
    import theano
    from theano.gof.sched import sort_schedule_fn, make_depends
    x = theano.tensor.matrix('x')
    y = theano.tensor.dot(x[:5] * 2, x.T + 1).T

    def str_cmp(a, b):
        return cmp(str(a), str(b))  # lexicographical sort

    linker = theano.OpWiseCLinker(schedule=sort_schedule_fn(str_cmp))
    mode = theano.Mode(linker=linker)
    f = theano.function((x,), (y,), mode=mode)

    nodes = f.maker.linker.make_all()[-1]
    depends = make_depends()
    for a, b in zip(nodes[:-1], nodes[1:]):
        if not depends((b, a)):
            assert str(a) < str(b)