test_basic.py 文件源码

def test_grad_abs():
    a = theano.tensor.fscalar("a")
    b = theano.tensor.nnet.relu(a)
    c = theano.grad(b, a)
    f = theano.function([a], c, mode=theano.Mode(optimizer=None))
    # Currently Theano return 0.5, but it isn't sure it won't change
    # in the futur.
    ret = f(0.)
    assert ret == 0.5, ret

# Testing of Composite is done in tensor/tests/test_opt.py
# in test_fusion, TestCompositeCodegen