def test_make_sigmoid_cross_entropy_loss_fn(self):
scores = [[0.2, 0.5, 0.3], [0.2, 0.3, 0.5]]
labels = [[0., 0., 1.], [0., 0., 1.]]
weights = [[2.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SIGMOID_CROSS_ENTROPY_LOSS)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
(_sigmoid_cross_entropy(labels[0], scores[0]) +
_sigmoid_cross_entropy(labels[1], scores[1])) / 6.,
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SIGMOID_CROSS_ENTROPY_LOSS,
weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
(_sigmoid_cross_entropy(labels[0], scores[0]) * 2.0 +
_sigmoid_cross_entropy(labels[1], scores[1])) / 6.,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SIGMOID_CROSS_ENTROPY_LOSS,
reduction=core_losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SIGMOID_CROSS_ENTROPY_LOSS,
reduction=core_losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_softmax_loss_fn(self):
scores = [[1., 3., 2.], [1., 2., 3.]]
labels = [[0., 0., 1.], [0., 0., 2.]]
weights = [[2.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
-(math.log(_softmax(scores[0])[2]) +
math.log(_softmax(scores[1])[2]) * 2.) / 2.,
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS,
weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
-(math.log(_softmax(scores[0])[2]) * 2. +
math.log(_softmax(scores[1])[2]) * 2. * 1.) / 2.,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_mean_squared_loss_fn(self):
scores = [[0.2, 0.5, 0.3], [0.2, 0.3, 0.5]]
labels = [[0., 0., 1.], [0., 0., 1.]]
weights = [[2.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.MEAN_SQUARED_LOSS)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
(_mean_squared_error(labels[0], scores[0]) +
_mean_squared_error(labels[1], scores[1])) / 6.,
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.MEAN_SQUARED_LOSS,
weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
(_mean_squared_error(labels[0], scores[0]) * 2.0 +
_mean_squared_error(labels[1], scores[1])) / 6.,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.MEAN_SQUARED_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.MEAN_SQUARED_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_list_mle_loss_fn(self):
with tf.Graph().as_default():
scores = [[0., ln(3), ln(2)], [0., ln(2), ln(3)]]
labels = [[0., 2., 1.], [1., 0., 2.]]
weights = [[2.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.LIST_MLE_LOSS)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
-((ln(3. / (3 + 2 + 1)) + ln(2. / (2 + 1)) + ln(1. / 1)) +
(ln(3. / (3 + 2 + 1)) + ln(1. / (1 + 2)) + ln(2. / 2))) / 2,
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.LIST_MLE_LOSS,
weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
-(2 * (ln(3. / (3 + 2 + 1)) + ln(2. / (2 + 1)) + ln(1. / 1)) + 1 *
(ln(3. / (3 + 2 + 1)) + ln(1. / (1 + 2)) + ln(2. / 2))) / 2,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.LIST_MLE_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.LIST_MLE_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_gumbel_approx_ndcg_fn(self):
with tf.Graph().as_default():
scores = [[1.4, -2.8, -0.4], [0., 1.8, 10.2], [1., 1.2, -3.2]]
labels = [[0., 2., 1.], [1., 0., 3.], [1., 0., 0.]]
weights = [[2.], [1.], [1.]]
# sampled_scores = [[-.291, -1.643, -2.826],
# [-.0866, -2.924, -3.530],
# [-12.42, -9.492, -7.939e-5],
# [-8.859, -6.830, -1.223e-3],
# [-.8930, -.5266, -45.80183],
# [-.6650, -.7220, -45.94149]]
# sampled_rank = [[1, 2, 3],
# [1, 2, 3],
# [3, 2, 1],
# [3, 2, 1],
# [2, 1, 3],
# [1, 2, 3]]
# expanded_labels = [[0., 2., 1.], [0., 2., 1.],
# [1., 0., 3.], [1., 0., 3.],
# [1., 0., 0.], [1., 0., 0.]]
# expanded_weights = [[2.], [2.], [1.], [1.], [1.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.GUMBEL_APPROX_NDCG_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM,
params={'temperature': 0.001},
gumbel_params={
'sample_size': 2,
'seed': 1
})
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
-((2 / (3 / ln(2) + 1 / ln(3))) * (3 / ln(3) + 1 / ln(4)) +
(2 / (7 / ln(2) + 1 / ln(3))) * (7 / ln(2) + 1 / ln(4)) +
(1 / (1 / ln(2))) * (1 / ln(3)) + 1),
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.GUMBEL_APPROX_NDCG_LOSS,
weights_feature_name=weights_feature_name,
reduction=tf.compat.v1.losses.Reduction.SUM,
params={'temperature': 0.001},
gumbel_params={
'sample_size': 2,
'seed': 1
})
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
-(2 * (2 / (3 / ln(2) + 1 / ln(3))) *
(3 / ln(3) + 1 / ln(4)) + 1 * (2 /
(7 / ln(2) + 1 / ln(3))) *
(7 / ln(2) + 1 / ln(4)) + 1 * (1 / (1 / ln(2))) *
(1 / ln(3)) + 1 * 1),
places=5)
def _model_fn(self):
"""Returns a model_fn."""
def _train_op_fn(loss):
"""Defines train op used in ranking head."""
update_ops = tf.compat.v1.get_collection(
tf.compat.v1.GraphKeys.UPDATE_OPS)
minimize_op = self._optimizer.minimize(
loss=loss, global_step=tf.compat.v1.train.get_global_step())
train_op = tf.group([update_ops, minimize_op])
return train_op
ranking_head = head.create_ranking_head(
loss_fn=losses.make_loss_fn(
self._hparams.get("loss"),
weights_feature_name=self._hparams.get(_LOSS_WEIGHT),
reduction=self._loss_reduction),
eval_metric_fns=self._eval_metric_fns(),
train_op_fn=_train_op_fn)
return model.make_groupwise_ranking_fn(
group_score_fn=self._group_score_fn,
group_size=1,
transform_fn=self._transform_fn,
ranking_head=ranking_head)
def test_make_loss_metric_fn(self):
scores = [[1., 3., 2.], [1., 2., 3.]]
labels = [[0., 0., 1.], [0., 0., 2.]]
weights = [[2.], [1.]]
weights_feature_name = 'weights'
features = {
weights_feature_name: weights,
}
m = ranking_losses.make_loss_metric_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS)
m_w = ranking_losses.make_loss_metric_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS,
weights_feature_name=weights_feature_name)
self._check_metrics([
(m(labels, scores,
features), -(math.log(_softmax(scores[0])[2]) +
math.log(_softmax(scores[1])[2]) * 2.) / 3.),
(m_w(labels, scores,
features), -(math.log(_softmax(scores[0])[2]) * 2. +
math.log(_softmax(scores[1])[2]) * 2. * 1.) / 4.),
])
# Value of loss metric is the same as loss with MEAN reduction.
with self.cached_session():
loss_fn_mean = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.SOFTMAX_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
loss_mean = loss_fn_mean(labels, scores, features).eval()
self._check_metrics([
(m(labels, scores, features), loss_mean),
])
def test_make_pairwise_mse_loss(self):
with tf.Graph().as_default():
scores = [[1., 3., 2.], [1., 2., 3.]]
labels = [[0., 0., 1.], [0., 0., 2.]]
weights = [[1.], [2.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.PAIRWISE_MSE_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
expected = (((2. - 3.) - (1. - 0.))**2 + ((2. - 1.) - (1. - 0.))**2 +
((3. - 1.) - (0. - 0.))**2 + ((3. - 2.) - (2. - 0.))**2 +
((3. - 1.) - (2. - 0.))**2 + ((2. - 1.) -
(0. - 0.))**2) / 6.
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(), expected, places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.PAIRWISE_MSE_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN,
weights_feature_name=weights_feature_name)
expected = (((2. - 3.) - (1. - 0.))**2 + ((2. - 1.) - (1. - 0.))**2 +
((3. - 1.) - (0. - 0.))**2 + 2 * ((3. - 2.) -
(2. - 0.))**2 + 2 *
((3. - 1.) - (2. - 0.))**2 + 2 * ((2. - 1.) -
(0. - 0.))**2) / 9.
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
expected,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.PAIRWISE_MSE_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.PAIRWISE_MSE_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_neural_sort_cross_entropy_loss_fn(self):
with tf.Graph().as_default():
scores = [[0.2, 0.5, 0.3], [0.2, 0.3, 0.5]]
labels = [[0., 0., 1.], [0., 0., 1.]]
weights = [[2.], [1.]]
p_scores = _neural_sort(scores)
p_labels = _neural_sort(labels)
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.
NEURAL_SORT_CROSS_ENTROPY_LOSS)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
(_softmax_cross_entropy(p_labels[0], p_scores[0]) +
_softmax_cross_entropy(p_labels[1], p_scores[1])) / 6.,
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.
NEURAL_SORT_CROSS_ENTROPY_LOSS,
weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
(_softmax_cross_entropy(p_labels[0], p_scores[0]) * 2.0 +
_softmax_cross_entropy(p_labels[1], p_scores[1])) / 6.,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.
NEURAL_SORT_CROSS_ENTROPY_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.
NEURAL_SORT_CROSS_ENTROPY_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_circle_loss(self):
with tf.Graph().as_default():
scores = [[0.1, 0.3, 0.2], [0.1, 0.2, 0.3]]
labels = [[0., 0., 1.], [0., 1., 2.]]
weights = [[2.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.CIRCLE_LOSS)
loss_0, _, _ = _circle_loss(labels[0], scores[0])
loss_1, _, _ = _circle_loss(labels[1], scores[1])
expected = (math.log1p(loss_0) + math.log1p(loss_1)) / 2.
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
expected, places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.CIRCLE_LOSS,
weights_feature_name=weights_feature_name)
loss_0, _, _ = _circle_loss(labels[0], scores[0])
loss_1, _, _ = _circle_loss(labels[1], scores[1])
expected = (math.log1p(loss_0) * 2. + math.log1p(loss_1) * 1.) / 2.
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
expected, places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.CIRCLE_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.CIRCLE_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def setUp(self):
super(GroupwiseRankingEstimatorTest, self).setUp()
ops.reset_default_graph()
self._model_dir = test.get_temp_dir()
gfile.MakeDirs(self._model_dir)
model_fn = model.make_groupwise_ranking_fn(
_group_score_fn,
group_size=2,
transform_fn=feature.make_identity_transform_fn(['context', 'weight']),
ranking_head=head.create_ranking_head(
loss_fn=losses.make_loss_fn(
losses.RankingLossKey.PAIRWISE_HINGE_LOSS,
weights_feature_name='weight'),
optimizer=training.AdagradOptimizer(learning_rate=0.1)))
self._estimator = estimator.Estimator(model_fn, self._model_dir)
def test_make_neural_sort_ndcg_fn(self):
with tf.Graph().as_default():
scores = [[1.4, -2.8, -0.4], [0., 1.8, 10.2], [1., 1.2, -3.2]]
labels = [[0., 2., 1.], [1., 0., 3.], [0., 0., 0.]]
weights = [[2.], [1.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.NEURAL_SORT_NDCG_LOSS,
params={'temperature': 0.1},
reduction=tf.compat.v1.losses.Reduction.SUM)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
-((1 / (3 / ln(2) + 1 / ln(3))) * (3 / ln(4) + 1 / ln(3)) +
(1 / (7 / ln(2) + 1 / ln(3))) * (7 / ln(2) + 1 / ln(4))),
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.NEURAL_SORT_NDCG_LOSS,
params={'temperature': 0.1},
weights_feature_name=weights_feature_name,
reduction=tf.compat.v1.losses.Reduction.SUM)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
-(2 * (1 / (3 / ln(2) + 1 / ln(3))) * (3 / ln(4) + 1 / ln(3)) + 1 *
(1 / (7 / ln(2) + 1 / ln(3))) * (7 / ln(2) + 1 / ln(4))),
places=5)
# Test different temperatures.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.NEURAL_SORT_NDCG_LOSS,
params={'temperature': 0.1})
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.NEURAL_SORT_NDCG_LOSS,
params={'temperature': 100.})
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.NEURAL_SORT_NDCG_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.NEURAL_SORT_NDCG_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_approx_ndcg_fn(self):
scores = [[1.4, -2.8, -0.4], [0., 1.8, 10.2], [1., 1.2, -3.2]]
labels = [[0., 2., 1.], [1., 0., 3.], [0., 0., 0.]]
weights = [[2.], [1.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_NDCG_LOSS,
reduction=core_losses.Reduction.SUM)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
-((1 / (3 / ln(2) + 1 / ln(3))) * (3 / ln(4) + 1 / ln(3)) +
(1 / (7 / ln(2) + 1 / ln(3))) * (7 / ln(2) + 1 / ln(4))),
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_NDCG_LOSS,
weights_feature_name=weights_feature_name,
reduction=core_losses.Reduction.SUM)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
-(2 * (1 /
(3 / ln(2) + 1 / ln(3))) * (3 / ln(4) + 1 / ln(3)) + 1 *
(1 / (7 / ln(2) + 1 / ln(3))) * (7 / ln(2) + 1 / ln(4))),
places=5)
# Test different alphas.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_NDCG_LOSS,
extra_args={'alpha': 0.1})
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_NDCG_LOSS,
extra_args={'alpha': 100.})
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_NDCG_LOSS,
reduction=core_losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_NDCG_LOSS,
reduction=core_losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def test_make_approx_mrr_fn(self):
with tf.Graph().as_default():
scores = [[1.4, -2.8, -0.4], [0., 1.8, 10.2], [1., 1.2, -3.2]]
labels = [[0., 0., 1.], [1., 0., 1.], [0., 0., 0.]]
weights = [[2.], [1.], [1.]]
weights_feature_name = 'weights'
features = {weights_feature_name: weights}
with self.cached_session():
loss_fn_simple = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_MRR_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
-((1 / 2.) + 1 / 2. * (1 / 3. + 1 / 1.)),
places=5)
loss_fn_weighted = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_MRR_LOSS,
weights_feature_name=weights_feature_name,
reduction=tf.compat.v1.losses.Reduction.SUM)
self.assertAlmostEqual(
loss_fn_weighted(labels, scores, features).eval(),
-(2 * 1 / 2. + 1 * 1 / 2. * (1 / 3. + 1 / 1.)),
places=5)
# Test different temperatures.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_MRR_LOSS,
params={'temperature': 10})
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_MRR_LOSS,
params={'temperature': 0.01})
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_MRR_LOSS,
reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
ranking_losses.RankingLossKey.APPROX_MRR_LOSS,
reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
def model_fn(features, labels, mode, params): # pylint: disable=unused-argument
"""The `model_fn` for TPUEstimator."""
tf_logging.info("*** Features ***")
for name in sorted(features.keys()):
tf_logging.info(" name = %s, shape = %s" % (name, features[name].shape))
input_ids = features["input_ids"]
input_mask = features["input_mask"]
segment_ids = features["segment_ids"]
if mode == tf.estimator.ModeKeys.PREDICT:
label_ids = tf.ones([input_ids.shape[0]], dtype=tf.int32)
else:
label_ids = features["label_ids"]
label_ids = tf.reshape(label_ids, [-1])
if "is_real_example" in features:
is_real_example = tf.cast(features["is_real_example"], dtype=tf.float32)
else:
is_real_example = tf.ones(tf.shape(label_ids), dtype=tf.float32)
is_training = (mode == tf.estimator.ModeKeys.TRAIN)
if "feed_features" in special_flags:
model = model_class(
config=bert_config,
is_training=is_training,
input_ids=input_ids,
input_mask=input_mask,
token_type_ids=segment_ids,
use_one_hot_embeddings=train_config.use_one_hot_embeddings,
features=features,
)
else:
model = model_class(
config=bert_config,
is_training=is_training,
input_ids=input_ids,
input_mask=input_mask,
token_type_ids=segment_ids,
use_one_hot_embeddings=train_config.use_one_hot_embeddings,
)
if "new_pooling" in special_flags:
pooled = mimic_pooling(model.get_sequence_output(), bert_config.hidden_size, bert_config.initializer_range)
else:
pooled = model.get_pooled_output()
if train_config.checkpoint_type != "bert_nli" and train_config.use_old_logits:
tf_logging.info("Use old version of logistic regression")
logits = tf.keras.layers.Dense(train_config.num_classes, name="cls_dense")(pooled)
else:
tf_logging.info("Use fixed version of logistic regression")
output_weights = tf.compat.v1.get_variable(
"output_weights", [3, bert_config.hidden_size],
initializer=tf.compat.v1.truncated_normal_initializer(stddev=0.02)
)
output_bias = tf.compat.v1.get_variable(
"output_bias", [3],
initializer=tf.compat.v1.zeros_initializer()
)
if is_training:
pooled = dropout(pooled, 0.1)
logits = tf.matmul(pooled, output_weights, transpose_b=True)
logits = tf.nn.bias_add(logits, output_bias)
# TODO given topic_ids, reorder logits to [num_group, num_max_items]
#
ndcg_rankin_loss = make_loss_fn(RankingLossKey.APPROX_NDCG_LOSS)
one_hot_labels = tf.one_hot(label_ids, 3)
# logits ; [batch_size, num_classes]
logits_t = tf.transpose(logits, [1,0])
one_hot_labels_t = tf.transpose(one_hot_labels, [1,0])
fake_logit = logits_t * 1e-5 + one_hot_labels_t
loss_arr = ndcg_rankin_loss(fake_logit, one_hot_labels_t, {})
loss = loss_arr
tvars = tf.compat.v1.trainable_variables()
initialized_variable_names = {}
if train_config.checkpoint_type == "bert":
assignment_fn = tlm.training.assignment_map.get_bert_assignment_map
elif train_config.checkpoint_type == "v2":
assignment_fn = tlm.training.assignment_map.assignment_map_v2_to_v2
elif train_config.checkpoint_type == "bert_nli":
assignment_fn = tlm.training.assignment_map.get_bert_nli_assignment_map
elif train_config.checkpoint_type == "attention_bert":
assignment_fn = tlm.training.assignment_map.bert_assignment_only_attention
elif train_config.checkpoint_type == "attention_bert_v2":
assignment_fn = tlm.training.assignment_map.assignment_map_v2_to_v2_only_attention
elif train_config.checkpoint_type == "wo_attention_bert":
assignment_fn = tlm.training.assignment_map.bert_assignment_wo_attention
elif train_config.checkpoint_type == "as_is":
assignment_fn = tlm.training.assignment_map.get_assignment_map_as_is
else:
if not train_config.init_checkpoint:
pass
else:
raise Exception("init_checkpoint exists, but checkpoint_type is not specified")
scaffold_fn = None
if train_config.init_checkpoint:
assignment_map, initialized_variable_names = assignment_fn(tvars, train_config.init_checkpoint)
def init_fn():
tf.compat.v1.train.init_from_checkpoint(train_config.init_checkpoint, assignment_map)
scaffold_fn = get_tpu_scaffold_or_init(init_fn, train_config.use_tpu)
log_var_assignments(tvars, initialized_variable_names)
TPUEstimatorSpec = tf.compat.v1.estimator.tpu.TPUEstimatorSpec
output_spec = None
if mode == tf.estimator.ModeKeys.TRAIN:
if "simple_optimizer" in special_flags:
tf_logging.info("using simple optimizer")
train_op = create_simple_optimizer(loss, train_config.learning_rate, train_config.use_tpu)
else:
train_op = optimization.create_optimizer_from_config(loss, train_config)
output_spec = TPUEstimatorSpec(mode=mode, loss=loss, train_op=train_op, scaffold_fn=scaffold_fn)
elif mode == tf.estimator.ModeKeys.EVAL:
eval_metrics = (classification_metric_fn, [
logits, label_ids, is_real_example
])
output_spec = TPUEstimatorSpec(mode=model, loss=loss, eval_metrics=eval_metrics, scaffold_fn=scaffold_fn)
else:
predictions = {
"input_ids": input_ids,
"logits": logits
}
output_spec = tf.compat.v1.estimator.tpu.TPUEstimatorSpec(
mode=mode,
predictions=predictions,
scaffold_fn=scaffold_fn)
return output_spec
def test_make_loss_fn(self):
scores = [[0.2, 0.5, 0.3], [0.2, 0.3, 0.5]]
labels = [[0., 0., 1.], [0., 0., 1.]]
weights = [[2.], [1.]]
weights_1d = [2., 1.]
weights_3d = [[[2.], [1.], [0.]], [[0.], [1.], [2.]]]
weights_feature_name = 'weights'
weights_1d_feature_name = 'weights_1d'
weights_3d_feature_name = 'weights_3d'
features = {
weights_feature_name: weights,
weights_1d_feature_name: weights_1d,
weights_3d_feature_name: weights_3d
}
with self.cached_session():
pairwise_hinge_loss = ranking_losses._pairwise_hinge_loss(labels,
scores).eval()
pairwise_hinge_loss_weighted = ranking_losses._pairwise_hinge_loss(
labels, scores, weights=weights).eval()
pairwise_hinge_loss_itemwise_weighted = (
ranking_losses._pairwise_hinge_loss(
labels, scores, weights=tf.squeeze(weights_3d)).eval())
mean_squared_loss = ranking_losses._mean_squared_loss(labels,
scores).eval()
mean_squared_loss_weighted = ranking_losses._mean_squared_loss(
labels, scores, weights=weights).eval()
mean_squared_loss_itemwise_weighted = ranking_losses._mean_squared_loss(
labels, scores, weights=tf.squeeze(weights_3d)).eval()
loss_keys = [
ranking_losses.RankingLossKey.PAIRWISE_HINGE_LOSS,
ranking_losses.RankingLossKey.MEAN_SQUARED_LOSS
]
loss_fn_simple = ranking_losses.make_loss_fn(loss_keys)
self.assertAlmostEqual(
loss_fn_simple(labels, scores, features).eval(),
pairwise_hinge_loss + mean_squared_loss,
places=5)
# With 2-d list-wise weighted examples.
loss_fn_weighted_example = ranking_losses.make_loss_fn(
loss_keys, weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
loss_fn_weighted_example(labels, scores, features).eval(),
pairwise_hinge_loss_weighted + mean_squared_loss_weighted,
places=5)
# With 1-d list-wise weighted examples.
loss_fn_weighted_example = ranking_losses.make_loss_fn(
loss_keys, weights_feature_name=weights_1d_feature_name)
self.assertAlmostEqual(
loss_fn_weighted_example(labels, scores, features).eval(),
pairwise_hinge_loss_weighted + mean_squared_loss_weighted,
places=5)
# With 3-d item-wise weighted examples.
loss_fn_weighted_example = ranking_losses.make_loss_fn(
loss_keys, weights_feature_name=weights_3d_feature_name)
self.assertAlmostEqual(
loss_fn_weighted_example(labels, scores, features).eval(),
pairwise_hinge_loss_itemwise_weighted +
mean_squared_loss_itemwise_weighted,
places=5)
# With both weighted loss and weighted examples.
loss_weights = [3., 2.]
weighted_loss_fn_weighted_example = ranking_losses.make_loss_fn(
loss_keys, loss_weights, weights_feature_name=weights_feature_name)
self.assertAlmostEqual(
weighted_loss_fn_weighted_example(labels, scores, features).eval(),
pairwise_hinge_loss_weighted * loss_weights[0] +
mean_squared_loss_weighted * loss_weights[1],
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
loss_keys, reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
loss_keys, reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
# Test invalid inputs.
with self.assertRaisesRegexp(ValueError,
r'loss_keys cannot be None or empty.'):
ranking_losses.make_loss_fn([])
with self.assertRaisesRegexp(ValueError,
r'loss_keys cannot be None or empty.'):
ranking_losses.make_loss_fn('')
with self.assertRaisesRegexp(
ValueError, r'loss_keys and loss_weights must have the same size.'):
ranking_losses.make_loss_fn(loss_keys, [2.0])
invalid_loss_fn = ranking_losses.make_loss_fn(['invalid_key'])
with self.assertRaisesRegexp(ValueError,
r'Invalid loss_key: invalid_key.'):
invalid_loss_fn(labels, scores, features).eval()
def _check_make_pairwise_loss(self, loss_key):
"""Helper function to test `make_loss_fn`."""
scores = [[1., 3., 2.], [1., 2., 3.]]
labels = [[0., 0., 1.], [0., 0., 2.]]
listwise_weights = [[2.], [1.]]
listwise_weights_expanded = [[2.] * 3, [1.] * 3]
itemwise_weights = [[2., 3., 4.], [1., 1., 1.]]
default_weights = [1.] * 3
weights_feature_name = 'weights'
list_size = 3.
features = {}
loss_fn = ranking_losses.make_loss_fn(loss_key)
with self.cached_session():
# Individual lists.
self.assertAlmostEqual(
loss_fn([labels[0]], [scores[0]], features).eval(),
_batch_aggregation(
[_pairwise_loss(labels[0], scores[0], default_weights,
loss_key)]),
places=5)
self.assertAlmostEqual(
loss_fn([labels[1]], [scores[1]], features).eval(),
_batch_aggregation(
[_pairwise_loss(labels[1], scores[1], default_weights,
loss_key)]),
places=5)
# Itemwise weights.
loss_fn = ranking_losses.make_loss_fn(
loss_key, weights_feature_name=weights_feature_name)
features[weights_feature_name] = [itemwise_weights[0]]
self.assertAlmostEqual(
loss_fn([labels[0]], [scores[0]], features).eval(),
_batch_aggregation([
_pairwise_loss(labels[0], scores[0], itemwise_weights[0],
loss_key)
]),
places=5)
features[weights_feature_name] = [itemwise_weights[1]]
self.assertAlmostEqual(
loss_fn([labels[1]], [scores[1]], features).eval(),
_batch_aggregation([
_pairwise_loss(labels[1], scores[1], itemwise_weights[1],
loss_key)
]),
places=5)
# Multiple lists.
features[weights_feature_name] = listwise_weights
self.assertAlmostEqual(
loss_fn(labels, scores, features).eval(),
_batch_aggregation([
_pairwise_loss(labels[0], scores[0], listwise_weights_expanded[0],
loss_key),
_pairwise_loss(labels[1], scores[1], listwise_weights_expanded[1],
loss_key)
]),
places=5)
# Test LambdaWeight.
lambda_weight = ranking_losses.DCGLambdaWeight(
rank_discount_fn=lambda r: 1. / tf.math.log1p(r), smooth_fraction=1.)
loss_fn = ranking_losses.make_loss_fn(
loss_key,
weights_feature_name=weights_feature_name,
lambda_weight=lambda_weight)
self.assertAlmostEqual(
loss_fn(labels, scores, features).eval(),
_batch_aggregation([
_pairwise_loss(
labels[0],
scores[0],
listwise_weights_expanded[0],
loss_key,
rank_discount_form='LOG'),
_pairwise_loss(
labels[1],
scores[1],
listwise_weights_expanded[1],
loss_key,
rank_discount_form='LOG')
]) * list_size,
places=5)
# Test loss reduction method.
# Two reduction methods should return different loss values.
loss_fn_1 = ranking_losses.make_loss_fn(
loss_key, reduction=tf.compat.v1.losses.Reduction.SUM)
loss_fn_2 = ranking_losses.make_loss_fn(
loss_key, reduction=tf.compat.v1.losses.Reduction.MEAN)
self.assertNotAlmostEqual(
loss_fn_1(labels, scores, features).eval(),
loss_fn_2(labels, scores, features).eval())
