def test_SymPyCCode():
if not theano.config.cxx:
pytest.skip("Need cxx for this test")
op = SymPyCCode([xs, ys], xs + ys)
e = op(xt, yt)
g = theano.gof.FunctionGraph([xt, yt], [e])
fn = theano.gof.CLinker().accept(g).make_function()
assert fn(1.0, 2.0) == 3.0
def test_multivar_grad():
op = SymPyCCode([xs, ys], xs**2 + ys**3)
zt = op(xt, yt)
dzdx, dzdy = theano.grad(zt, [xt, yt])
assert dzdx.owner.op.expr == 2 * xs
assert dzdy.owner.op.expr == 3 * ys**2
def test_grad():
op = SymPyCCode([xs], xs**2)
zt = op(xt)
ztprime = theano.grad(zt, xt)
assert ztprime.owner.op.expr == 2 * xs
def test_SymPyCCode():
op = SymPyCCode([xs, ys], xs + ys)
e = op(xt, yt)
g = theano.gof.FunctionGraph([xt, yt], [e])
fn = theano.link.c.basic.CLinker().accept(g).make_function()
assert fn(1.0, 2.0) == 3.0