test_function_module.py 文件源码

def test_borrow_output(self):
        a = T.dmatrix()
        f = function([a], Out(a, borrow=False))
        o = N.ones((3, 3))
        assert o is not f(o)  # function no longer permits aliasing outputs to inputs

        f = function([a], Out(a * 4, borrow=False))
        o = N.ones((3, 3))
        four = f(o)
        assert numpy.all(four == 4)
        f(o + .1)  # should not clobber the memory used to store four
        assert numpy.all(four == 4)

        f = function([a], Out(a * 4, borrow=True), mode=theano.Mode('c|py_nogc', 'fast_run'))
        o = N.ones((3, 3))
        four = f(o)
        assert numpy.all(four == 4)
        f(o + .1)  # should clobber the memory used to store four
        if theano.config.cxx:
            assert not numpy.all(four == 4)
        else:
            # The Elemwise.perform method don't reuse memory
            # as some numpy version don't support that correctly.
            assert numpy.all(four == 4)