Python tensor.col方法代碼示例

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import col [as 別名]
def test_wrong_broadcast(self):
        a = tt.col()
        increment = tt.vector()

        # These symbolic graphs legitimate, as long as increment has exactly
        # one element. So it should fail at runtime, not at compile time.
        rng = numpy.random.RandomState(utt.fetch_seed())

        def rng_randX(*shape):
            return rng.rand(*shape).astype(theano.config.floatX)

        for op in (tt.set_subtensor, tt.inc_subtensor):
            for base in (a[:], a[0]):
                out = op(base, increment)
                f = theano.function([a, increment], out)
                # This one should work
                f(rng_randX(3, 1), rng_randX(1))
                # These ones should not
                self.assertRaises(ValueError,
                                  f, rng_randX(3, 1), rng_randX(2))
                self.assertRaises(ValueError,
                                  f, rng_randX(3, 1), rng_randX(3))
                self.assertRaises(ValueError,
                                  f, rng_randX(3, 1), rng_randX(0)) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import col [as 別名]
def test_ndim_mismatch(self):
        rng = numpy.random.RandomState(utt.fetch_seed())
        data = rng.rand(5).astype(self.dtype)
        x = self.shared(data)
        y = tensor.col('y', self.dtype)
        cond = theano.tensor.iscalar('cond')

        self.assertRaises(TypeError, ifelse, cond, x, y)
        self.assertRaises(TypeError, ifelse, cond, y, x) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import col [as 別名]
def neural_tensor_network():
    # tensor params
    subj = T.col('e_1')
    targets = T.matrix('e_2')
    W = T.tensor3('W')

    # neural net params
    u = T.col('u')
    V = T.matrix('V')
    b = T.col('b')

    # tensor
    h = subj.T.dot(W).dot(targets)

    # neural net
    d = subj.shape[0]
    V_subj = V[:, :d].dot(subj)
    V_targ = V[:, d:].dot(targets)

    activations = T.tanh(h + V_subj + V_targ + b)
    score = u.T.dot(activations).reshape((-1, 1))

    margins = score[0] - score[1:]
    cost = T.min(T.concatenate((T.ones_like(margins), margins), axis=1), axis=1).mean()

    gsubj, gtargets, gW, gu, gV, gb = T.grad(cost, [subj, targets, W, u, V, b])

    print 'Compiling NTN score'
    score = theano.function([subj, W, targets, u, V, b], score, name='NTN Score',
                            mode='FAST_RUN')

    print 'Compiling NTN fprop'
    fprop = theano.function([subj, W, targets, u, V, b], cost, name='NTN fprop',
                            mode='FAST_RUN')

    print 'Compiling NTN bprop'
    bprop = theano.function([subj, W, targets, u, V, b],
                            outputs=[gsubj, gW, gtargets, gu, gV, gb],
                            name='NTN bprop', mode='FAST_RUN')

    return {'score': score, 'fprop': fprop, 'bprop': bprop} 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import col [as 別名]
def test_gemm_canonicalize():
    X, Y, Z, a, b = T.matrix('X'), T.matrix('Y'), T.matrix('Z'), T.scalar(
        'a'), T.scalar('b')
    R, S, U, c, d = T.matrix('R'), T.matrix('S'), T.matrix('U'), T.scalar(
        'c'), T.scalar('d')
    u = T.row('u')
    v = T.vector('v')
    w = T.col('w')

    can = []
    _gemm_canonicalize(X + Y + Z, 1.0, can, 0)
    assert can == [(1.0, X), (1.0, Y), (1.0, Z)]

    can = []
    _gemm_canonicalize(X + Y + u, 1.0, can, 0)
    assert can == [(1.0, X), (1.0, Y), (1.0, u)], can

    can = []
    _gemm_canonicalize(X + Y + v, 1.0, can, 0)
    # [(1.0, X), (1.0, Y), (1.0, InplaceDimShuffle{x,0}(v))]
    assert can[:2] == [(1.0, X), (1.0, Y)]
    assert isinstance(can[2], tuple)
    assert len(can[2]) == 2
    assert can[2][0] == 1.0
    assert can[2][1].owner
    assert isinstance(can[2][1].owner.op, T.DimShuffle)
    assert can[2][1].owner.inputs == [v]

    can = []
    _gemm_canonicalize(X + Y + w, 1.0, can, 0)
    assert can == [(1.0, X), (1.0, Y), (1.0, w)], can

    can = []
    _gemm_canonicalize(a * X + Y - b * Z * c, 1.0, can, 0)
    assert can[0] == (a, X)
    assert can[1] == (1.0, Y)
    assert can[2][0].owner.op == T.mul
    assert can[2][0].owner.inputs[0].owner.op == T.neg
    assert can[2][0].owner.inputs[0].owner.inputs[0] == c
    assert can[2][0].owner.inputs[1] == b

    can = []
    _gemm_canonicalize((-d) * X - (a * X + Y - b * Z * c), 1.0, can, 0)
    # print can
    assert can[0][0].owner.op == T.neg
    assert can[0][0].owner.inputs[0] == d
    assert can[0][1] == X
    assert can[1][0].owner.op == T.neg
    assert can[1][0].owner.inputs[0] == a
    assert can[2] == (-1.0, Y)
    assert can[3][0].owner.op == T.mul
    assert can[3][0].owner.inputs == [c, b] 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import col [as 別名]
def transE_model():
    '''
        Note X_S is a column and X_T is a matrix so that broadcasting occurs
        across the columns of X_T (this allows batching X_T with negatives,
        for example.
    '''
    # construct theano expression graph
    X_s = T.col('X_s')
    W = T.matrix('W')
    X_t = T.matrix('X_t')

    rels = W[:, :, None].transpose(1, 0, 2)

    # Computes x_{r_1} + x_{r_{2}} + ... + x_{r_n} - X_{t}
    results, updates = theano.scan(fn=lambda rel, v: rel + v,
                                   outputs_info=-X_t, sequences=[rels])

    # score is always a column vector
    score = T.sum((X_s + results[-1]) ** 2, axis=0).reshape((-1, 1))

    margins = 1. + score[0] - score[1:]

    # zero out negative entries
    pos_parts = margins * (margins > 0)

    # we are using online Maximizer, so the objective is negated
    cost = -pos_parts.mean()

    gX_s, gW, gX_t = T.grad(cost, [X_s, W, X_t])

    print 'Compiling TransE score'
    # return negative score since this is a ranking
    score = theano.function([X_s, W, X_t], -score, name='transE Score',
                            mode='FAST_RUN')
    score.trust_input = True

    print 'Compiling TransE fprop'
    fprop = theano.function([X_s, W, X_t], cost, name='transE fprop',
                            mode='FAST_RUN')
    fprop.trust_input = True

    print 'Compiling TransE bprop'
    bprop = theano.function([X_s, W, X_t],
                            outputs=[gX_s, gW, gX_t],
                            name='transE bprop', mode='FAST_RUN')
    bprop.trust_input = True

    return {'score': score, 'fprop': fprop, 'bprop': bprop}


# Note: Model assumes we only use corrupted target entities with the first
# target entity the true entity