def testNumericEquivalenceForAmsgrad(self):
if tf.executing_eagerly():
self.skipTest(
'v1 optimizer does not run in eager mode')
np.random.seed(1331)
with test_utils.use_gpu():
train_samples = 20
input_dim = 3
num_classes = 2
(x, y), _ = test_utils.get_test_data(
train_samples=train_samples,
test_samples=10,
input_shape=(input_dim,),
num_classes=num_classes)
y = np_utils.to_categorical(y)
num_hidden = 5
model_k_v1 = test_utils.get_small_sequential_mlp(
num_hidden=num_hidden, num_classes=num_classes, input_dim=input_dim)
model_k_v2 = test_utils.get_small_sequential_mlp(
num_hidden=num_hidden, num_classes=num_classes, input_dim=input_dim)
model_k_v2.set_weights(model_k_v1.get_weights())
opt_k_v1 = optimizer_v1.Adam(amsgrad=True)
opt_k_v2 = adam.Adam(amsgrad=True)
model_k_v1.compile(
opt_k_v1,
loss='categorical_crossentropy',
metrics=[],
run_eagerly=test_utils.should_run_eagerly())
model_k_v2.compile(
opt_k_v2,
loss='categorical_crossentropy',
metrics=[],
run_eagerly=test_utils.should_run_eagerly())
hist_k_v1 = model_k_v1.fit(x, y, batch_size=5, epochs=10, shuffle=False)
hist_k_v2 = model_k_v2.fit(x, y, batch_size=5, epochs=10, shuffle=False)
self.assertAllClose(model_k_v1.get_weights(), model_k_v2.get_weights())
self.assertAllClose(opt_k_v1.get_weights(), opt_k_v2.get_weights())
self.assertAllClose(hist_k_v1.history['loss'], hist_k_v2.history['loss'])
def test_string_input(self):
seq = keras.Sequential(
[
keras.layers.InputLayer(input_shape=(1,), dtype=tf.string),
keras.layers.Lambda(lambda x: x[0]),
]
)
seq.run_eagerly = test_utils.should_run_eagerly()
preds = seq.predict([["tensorflow eager"]])
self.assertEqual(preds.shape, (1,))
def test_activity_regularization(self, regularizer):
(x_train, y_train), _ = self.get_data()
model = self.create_model(activity_regularizer=regularizer)
model.compile(
loss="categorical_crossentropy",
optimizer="sgd",
run_eagerly=test_utils.should_run_eagerly(),
)
self.assertEqual(len(model.losses), 1 if tf.executing_eagerly() else 1)
model.fit(x_train, y_train, batch_size=10, epochs=1, verbose=0)
def _get_simple_bias_model(self):
model = test_utils.get_model_from_layers(
[test_utils.Bias()], input_shape=(1,)
)
model.compile(
keras.optimizers.optimizer_v2.gradient_descent.SGD(0.1),
"mae",
run_eagerly=test_utils.should_run_eagerly(),
)
return model
def test_GRU_runtime_with_mask(self):
# Masking will affect which backend is selected based on whether the mask
# is strictly right padded.
layer = keras.layers.GRU(self.rnn_state_size, return_runtime=True)
inputs = keras.layers.Input(shape=[self.timestep, self.input_shape],
dtype=tf.float32)
masked_inputs = keras.layers.Masking()(inputs)
outputs, runtime = layer(masked_inputs)
# Expand the runtime so that it is a 1D tensor instead of scalar.
# TF model does not work with scalar model output, specially during
# aggregation.
runtime = keras.layers.Lambda(lambda x: tf.expand_dims(x, axis=-1))(
runtime)
model = keras.models.Model(inputs=inputs, outputs=[outputs, runtime])
(x_train, y_train), _ = test_utils.get_test_data(
train_samples=self.batch,
test_samples=0,
input_shape=(self.timestep, self.input_shape),
num_classes=self.output_shape,
)
y_train = np_utils.to_categorical(y_train, self.output_shape)
model.compile(
optimizer="sgd",
loss=["categorical_crossentropy", None],
run_eagerly=test_utils.should_run_eagerly(),
)
model.fit(x_train, y_train)
# Verify unpadded data.
_, runtime_value = model.predict(x_train)
if tf.test.is_gpu_available():
self.assertEqual(runtime_value[0], gru_lstm_utils.RUNTIME_GPU)
else:
self.assertEqual(runtime_value[0], gru_lstm_utils.RUNTIME_CPU)
# Update x/y to be right padded by setting the last timestep to 0
x_train[:, -1, :] = 0
y_train[:, -1] = 0
_, runtime_value = model.predict(x_train)
if tf.test.is_gpu_available():
self.assertEqual(runtime_value[0], gru_lstm_utils.RUNTIME_GPU)
else:
self.assertEqual(runtime_value[0], gru_lstm_utils.RUNTIME_CPU)
# Further update x/y to be mix padded (masks in the middle), and verify
# only cpu kernel can be selected.
x_train[:, -3, :] = 0
y_train[:, -3] = 0
_, runtime_value = model.predict(x_train)
self.assertEqual(runtime_value[0], gru_lstm_utils.RUNTIME_CPU)
def get_compiled_multi_io_model_temporal(sample_weight_mode):
model = get_multi_io_temporal_model()
model.compile(
optimizer=optimizer_v2.gradient_descent.SGD(0.1),
loss="mae",
metrics=[metrics.MeanAbsoluteError(name="mae")],
weighted_metrics=[metrics.MeanAbsoluteError(name="mae_2")],
sample_weight_mode=sample_weight_mode,
run_eagerly=test_utils.should_run_eagerly(),
)
return model
def test_sequential_nesting(self):
model = test_utils.get_small_sequential_mlp(4, 3)
inner_model = test_utils.get_small_sequential_mlp(4, 5)
model.add(inner_model)
model.compile(loss='mse',
optimizer='rmsprop',
run_eagerly=test_utils.should_run_eagerly())
x = np.random.random((2, 6))
y = np.random.random((2, 5))
model.fit(x, y, epochs=1)
def test_add_entropy_loss_on_functional_model(self):
inputs = Input(shape=(1,))
targets = Input(shape=(1,))
outputs = test_utils.Bias()(inputs)
model = Model([inputs, targets], outputs)
model.add_loss(losses.binary_crossentropy(targets, outputs))
model.compile('sgd', run_eagerly=test_utils.should_run_eagerly())
with tf.compat.v1.test.mock.patch.object(logging, 'warning') as mock_log:
model.fit([self.x, self.y], batch_size=3, epochs=5)
self.assertNotIn('Gradients do not exist for variables',
str(mock_log.call_args))
def _get_multiple_input_model(self, subclassed=True):
if subclassed:
model = MultiInputSubclassed()
else:
model = multi_input_functional()
model.compile(
keras.optimizers.optimizer_v2.gradient_descent.SGD(0.1),
"mae",
run_eagerly=test_utils.should_run_eagerly(),
)
return model
def test_restore_old_loss_scale_checkpoint(self):
# Ensure a checkpoint from TF 2.2 can be loaded. The checkpoint format
# of LossScaleOptimizer changed, but old checkpoints can still be loaded
opt = gradient_descent.SGD(0.1, momentum=0.1)
opt = loss_scale_optimizer.LossScaleOptimizer(opt)
model = sequential.Sequential(
[
core.Dense(
2,
)
]
)
# The checkpoint and expected values were obtained from the program in
# testdata/BUILD.
ckpt_dir = os.path.join(
flags.FLAGS["test_srcdir"].value,
"org_keras/keras",
"mixed_precision/testdata/lso_ckpt_tf2.2",
)
# ckpt_dir = test.test_src_dir_path(
# 'python/keras/mixed_precision/testdata/lso_ckpt_tf2.2')
model.load_weights(os.path.join(ckpt_dir, "ckpt"))
model.compile(opt, "mse", run_eagerly=test_utils.should_run_eagerly())
model(np.zeros((2, 2))) # Create model weights
opt._create_all_weights(model.weights)
expected_kernel = np.array(
[[9.229685, 10.901115], [10.370763, 9.757362]]
)
expected_slot = np.array([[10.049943, 9.917691], [10.049943, 9.917691]])
self.assertAllClose(self.evaluate(model.weights[0]), expected_kernel)
self.assertAllClose(
self.evaluate(opt.get_slot(model.weights[0], "momentum")),
expected_slot,
)
self.assertEqual(self.evaluate(opt.loss_scale), 32768)
self.assertEqual(self.evaluate(opt.dynamic_counter), 1)
# Check restoring works even after the model is compiled and the weights
# have been created.
model.fit(np.random.normal(size=(2, 2)), np.random.normal(size=(2, 2)))
self.assertNotAllClose(self.evaluate(model.weights[0]), expected_kernel)
self.assertNotAllClose(
self.evaluate(opt.get_slot(model.weights[0], "momentum")),
expected_slot,
)
model.load_weights(os.path.join(ckpt_dir, "ckpt"))
self.assertAllClose(self.evaluate(model.weights[0]), expected_kernel)
self.assertAllClose(
self.evaluate(opt.get_slot(model.weights[0], "momentum")),
expected_slot,
)
self.assertEqual(self.evaluate(opt.loss_scale), 32768)
self.assertEqual(self.evaluate(opt.dynamic_counter), 1)
def test_serializing_model_with_metric_with_custom_object_scope(
self, value):
def get_instance(x):
if isinstance(x, str):
return x
if isinstance(x, type) and issubclass(x, metrics.Metric):
return x()
return x
metric_input = tf.nest.map_structure(get_instance, value)
weighted_metric_input = tf.nest.map_structure(get_instance, value)
with generic_utils.custom_object_scope({
"MyMeanAbsoluteError": MyMeanAbsoluteError,
"_my_mae": _my_mae,
"Bias": test_utils.Bias,
}):
model = _get_multi_io_model()
model.compile(
optimizer_v2.gradient_descent.SGD(0.1),
"mae",
metrics=metric_input,
weighted_metrics=weighted_metric_input,
run_eagerly=test_utils.should_run_eagerly(),
)
history = model.fit(
[self.x, self.x],
[self.y, self.y],
batch_size=3,
epochs=3,
sample_weight=[self.w, self.w],
)
# Assert training.
self.assertAllClose(history.history["loss"], [2.0, 1.6, 1.2], 1e-3)
eval_results = model.evaluate(
[self.x, self.x],
[self.y, self.y],
sample_weight=[self.w, self.w],
)
if h5py is None:
return
model.save(self.model_filename)
loaded_model = keras.models.load_model(self.model_filename)
loaded_model.predict([self.x, self.x])
loaded_eval_results = loaded_model.evaluate(
[self.x, self.x],
[self.y, self.y],
sample_weight=[self.w, self.w],
)
# Assert all evaluation results are the same.
self.assertAllClose(eval_results, loaded_eval_results, 1e-9)
def _get_compiled_multi_io_model(self):
model = get_multi_io_model()
model.compile(
optimizer='rmsprop',
loss='mse',
metrics=[metrics.MeanSquaredError(name='mean_squared_error')],
weighted_metrics=[
metrics.MeanSquaredError(name='mean_squared_error_2')
],
run_eagerly=test_utils.should_run_eagerly())
return model
def test_wide_deep_model_with_single_input(self):
linear_model = linear.LinearModel(units=1)
dnn_model = sequential.Sequential([core.Dense(units=1, input_dim=3)])
wide_deep_model = wide_deep.WideDeepModel(linear_model, dnn_model)
inputs = np.random.uniform(low=-5., high=5., size=(64, 3))
output = .3 * inputs[:, 0]
wide_deep_model.compile(optimizer=['sgd', 'adam'],
loss='mse',
metrics=[],
run_eagerly=test_utils.should_run_eagerly())
wide_deep_model.fit(inputs, output, epochs=5)
def test_zero_regularization(self):
# Verifies that training with zero regularization works.
x, y = np.ones((10, 10)), np.ones((10, 3))
model = test_utils.get_model_from_layers([
keras.layers.Dense(3, kernel_regularizer=keras.regularizers.l2(0))
],
input_shape=(10, ))
model.compile('sgd',
'mse',
run_eagerly=test_utils.should_run_eagerly())
model.fit(x, y, batch_size=5, epochs=1)
def test_setter_update(self):
"""Test the prototyped setter method."""
input_data = keras.Input(shape=(1,))
layer = AddingPreprocessingLayer()
output = layer(input_data)
model = keras.Model(input_data, output)
model._run_eagerly = test_utils.should_run_eagerly()
layer.set_total(15)
self.assertAllEqual([[16], [17], [18]], model.predict([1.0, 2.0, 3.0]))
def test_with_masking_layer_gru(self):
layer_class = keras.layers.GRU
inputs = np.random.random((2, 3, 4))
targets = np.abs(np.random.random((2, 3, 5)))
targets /= targets.sum(axis=-1, keepdims=True)
model = keras.models.Sequential()
model.add(keras.layers.Masking(input_shape=(3, 4)))
model.add(layer_class(units=5, return_sequences=True, unroll=False))
model.compile(loss='categorical_crossentropy',
optimizer='rmsprop',
run_eagerly=test_utils.should_run_eagerly())
model.fit(inputs, targets, epochs=1, batch_size=2, verbose=1)
def test_build_before_fit(self):
# Fix for b/112433577
model = test_utils.get_small_sequential_mlp(4, 5)
model.compile(loss='mse',
optimizer='rmsprop',
run_eagerly=test_utils.should_run_eagerly())
model.build((None, 6))
x = np.random.random((2, 6))
y = np.random.random((2, 5))
model.fit(x, y, epochs=1)
def test_build_behavior(self):
# Test graph network creation after __call__
model = get_model()
model(np.random.random((2, 6)))
self.assertLen(model.weights, 4)
self.assertTrue(model._is_graph_network)
self.assertLen(model.inputs, 1)
self.assertLen(model.outputs, 1)
self.assertEqual(model.inputs[0].shape.as_list(), [2, 6])
self.assertEqual(model.outputs[0].shape.as_list(), [2, 2])
# Test effect of new __call__ with a different shape
model(np.random.random((3, 6)))
self.assertLen(model.inputs, 1)
self.assertLen(model.outputs, 1)
self.assertEqual(model.inputs[0].shape.as_list(), [None, 6])
self.assertEqual(model.outputs[0].shape.as_list(), [None, 2])
model(np.random.random((4, 6)))
self.assertLen(model.inputs, 1)
self.assertLen(model.outputs, 1)
self.assertEqual(model.inputs[0].shape.as_list(), [None, 6])
self.assertEqual(model.outputs[0].shape.as_list(), [None, 2])
# Test graph network creation after build
model = get_model()
model.build((None, 6))
self.assertLen(model.weights, 4)
self.assertTrue(model._is_graph_network)
self.assertLen(model.inputs, 1)
self.assertLen(model.outputs, 1)
self.assertEqual(model.inputs[0].shape.as_list(), [None, 6])
self.assertEqual(model.outputs[0].shape.as_list(), [None, 2])
# Test graph network creation after compile/fit
model = get_model()
model.compile(
loss="mse",
optimizer="rmsprop",
metrics=[keras.metrics.CategoricalAccuracy()],
run_eagerly=test_utils.should_run_eagerly(),
)
model.fit(np.zeros((2, 6)), np.zeros((2, 2)))
self.assertLen(model.weights, 4)
self.assertTrue(model._is_graph_network)
self.assertLen(model.inputs, 1)
self.assertLen(model.outputs, 1)
# Inconsistency here: with eager `fit`, the model is built with shape
# (2, 6), but with graph function `fit`, it is built with shape `(None,
# 6)`. This is likely due to our assumption "the batch size should be
# dynamic" at the level of `Model`. TODO(fchollet): investigate and
# resolve.
self.assertEqual(model.inputs[0].shape.as_list()[-1], 6)
self.assertEqual(model.outputs[0].shape.as_list()[-1], 2)
def test_clone_and_build_sequential_without_inputs_defined(self):
model = models.Sequential(_get_layers(input_shape=None))
model.compile(test_utils.get_v2_optimizer('rmsprop'),
'mse',
metrics=['acc', metrics.categorical_accuracy],
run_eagerly=test_utils.should_run_eagerly())
self._clone_and_build_test_helper(model, 'sequential')
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
model.train_on_batch(inp, out)
self._clone_and_build_test_helper(model, 'sequential')
def _get_compiled_multi_io_model(self):
model = get_multi_io_model()
model.compile(
optimizer="rmsprop",
loss="mse",
metrics=[metrics.MeanSquaredError(name="mean_squared_error")],
weighted_metrics=[
metrics.MeanSquaredError(name="mean_squared_error_2")
],
run_eagerly=test_utils.should_run_eagerly(),
)
return model
def test_dataset_fit_correctness(self):
class SumLayer(keras.layers.Layer):
def build(self, _):
self.w = self.add_weight('w', ())
def call(self, inputs):
return keras.backend.sum(inputs, axis=1,
keepdims=True) + self.w * 0
model = keras.Sequential([SumLayer(input_shape=(2, ))])
model.compile('rmsprop',
loss='mae',
run_eagerly=test_utils.should_run_eagerly())
inputs = np.zeros((40, 2), dtype=np.float32)
inputs[10:20, :] = 2
inputs[20:30, :] = 1
inputs[30:, :] = 4
targets = np.zeros((40, 1), dtype=np.float32)
# Test correctness with `steps_per_epoch`.
train_dataset = tf.data.Dataset.from_tensor_slices(
(inputs, targets)).batch(10)
val_dataset = tf.data.Dataset.from_tensor_slices(
(inputs, targets)).batch(10)
history = model.fit(train_dataset,
epochs=2,
steps_per_epoch=2,
verbose=1,
validation_data=val_dataset,
validation_steps=2)
self.assertAllClose(history.history['loss'],
[inputs[:20].sum() / 20, inputs[20:].sum() / 20])
# The validation dataset will be reset at the end of each validation run.
self.assertAllClose(history.history['val_loss'],
[inputs[:20].sum() / 20, inputs[:20].sum() / 20])
# Test correctness with dataset reset.
train_dataset = tf.data.Dataset.from_tensor_slices(
(inputs, targets)).batch(10)
val_dataset = tf.data.Dataset.from_tensor_slices(
(inputs, targets)).batch(10)
history = model.fit(train_dataset,
epochs=2,
verbose=1,
validation_data=val_dataset)
self.assertAllClose(
history.history['loss'],
[inputs.sum() / 40, inputs.sum() / 40])
self.assertAllClose(
history.history['val_loss'],
[inputs.sum() / 40, inputs.sum() / 40])
def test_generator_input_to_fit_eval_predict(self):
val_data = np.ones([10, 10], np.float32), np.ones([10, 1], np.float32)
def ones_generator():
while True:
yield np.ones([10, 10], np.float32), np.ones([10, 1], np.float32)
model = test_utils.get_small_mlp(
num_hidden=10, num_classes=1, input_dim=10)
model.compile(
rmsprop.RMSprop(0.001),
'binary_crossentropy',
run_eagerly=test_utils.should_run_eagerly())
model.fit(
ones_generator(),
steps_per_epoch=2,
validation_data=val_data,
epochs=2)
model.evaluate(ones_generator(), steps=2)
model.predict(ones_generator(), steps=2)
# Test with a changing batch size
model = test_utils.get_small_mlp(
num_hidden=3, num_classes=4, input_dim=2)
model.compile(
loss='mse',
optimizer=rmsprop.RMSprop(1e-3),
metrics=['mae', metrics_module.CategoricalAccuracy()])
model.fit_generator(custom_generator_changing_batch_size(),
steps_per_epoch=5,
epochs=1,
verbose=1,
max_queue_size=10,
use_multiprocessing=False)
model.fit_generator(custom_generator_changing_batch_size(),
steps_per_epoch=5,
epochs=1,
verbose=1,
max_queue_size=10,
use_multiprocessing=False,
validation_data=custom_generator_changing_batch_size(),
validation_steps=10)
model.fit(
custom_generator_changing_batch_size(),
steps_per_epoch=5,
validation_data=custom_generator_changing_batch_size(),
validation_steps=10,
epochs=2)
model.evaluate(custom_generator_changing_batch_size(), steps=5)
model.predict(custom_generator_changing_batch_size(), steps=5)
def test_activity_regularizer_batch_independent(self):
inputs = layers.Input(shape=(10, ))
x = layers.Dense(10, activation='relu',
activity_regularizer='l2')(inputs)
outputs = layers.Dense(1, activation='sigmoid')(x)
model = Model(inputs, outputs)
optimizer = RMSPropOptimizer(learning_rate=0.001)
model.compile(optimizer, run_eagerly=test_utils.should_run_eagerly())
loss_small_batch = model.test_on_batch(np.ones((10, 10), 'float32'))
loss_big_batch = model.test_on_batch(np.ones((20, 10), 'float32'))
self.assertAlmostEqual(loss_small_batch, loss_big_batch, places=4)
def test_model_backend_float64_use_cases(self):
# Test case for GitHub issue 19318
floatx = keras.backend.floatx()
keras.backend.set_floatx('float64')
x = keras.Input((5, ))
y = keras.layers.Dense(1)(x)
model = keras.models.Model(x, y)
model.compile(test_utils.get_v2_optimizer('rmsprop'),
'mse',
run_eagerly=test_utils.should_run_eagerly())
keras.backend.set_floatx(floatx)
def test_ragged_tensor_rebatched_outputs(self):
# Create a model that accepts an input, converts it to Ragged, and
# converts the ragged tensor back to a dense tensor.
layers = [ToRagged(padding=0)]
model = test_utils.get_model_from_layers(layers, input_shape=(None, ))
model._run_eagerly = test_utils.should_run_eagerly()
# Define some input data with additional padding.
input_data = np.array([[1, 0, 0], [2, 3, 0], [4, 0, 0], [5, 6, 0]])
output = model.predict(input_data, batch_size=2)
expected_values = [[1], [2, 3], [4], [5, 6]]
self.assertAllEqual(expected_values, output)
def test_regularization_shared_layer(self, regularizer):
dense_layer = keras.layers.Dense(
NUM_CLASSES,
kernel_regularizer=regularizer,
activity_regularizer=regularizer,
)
model = self.create_multi_input_model_from(dense_layer, dense_layer)
model.compile(
loss="categorical_crossentropy",
optimizer="sgd",
run_eagerly=test_utils.should_run_eagerly(),
)
self.assertLen(model.losses, 5)
def test_clone_and_build_non_compiled_model(self):
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
model = _get_model()
with self.assertRaisesRegex(ValueError, 'has not been compiled'):
models.clone_and_build_model(model, compile_clone=True)
is_subclassed = (test_utils.get_model_type() == 'subclass')
# With placeholder creation
new_model = models.clone_and_build_model(
model, compile_clone=False, in_place_reset=is_subclassed)
with self.assertRaisesRegex(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegex(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile(
test_utils.get_v2_optimizer('rmsprop'),
'mse',
run_eagerly=test_utils.should_run_eagerly())
new_model.train_on_batch(inp, out)
# Create new tensors for inputs.
input_a = keras.Input(shape=(4,))
new_model = models.clone_and_build_model(
model,
input_tensors=input_a,
compile_clone=False,
in_place_reset=is_subclassed)
with self.assertRaisesRegex(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegex(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile(
test_utils.get_v2_optimizer('rmsprop'),
'mse',
run_eagerly=test_utils.should_run_eagerly())
new_model.train_on_batch(inp, out)
def test_pre_build_adapt_update_numpy(self):
"""Test that preproc layers can adapt() before build() is called."""
input_dataset = np.array([1, 2, 3, 4, 5])
layer = AddingPreprocessingLayer()
layer.adapt(input_dataset)
input_data = keras.Input(shape=(1,))
output = layer(input_data)
model = keras.Model(input_data, output)
model._run_eagerly = test_utils.should_run_eagerly()
self.assertAllEqual([[16], [17], [18]], model.predict([1.0, 2.0, 3.0]))
def test_activity_regularizer_loss_value(self):
layer = layers.Dense(1,
kernel_initializer='zeros',
bias_initializer='ones',
activity_regularizer='l2')
model = test_utils.get_model_from_layers([layer], input_shape=(10, ))
x = np.ones((10, 10), 'float32')
optimizer = RMSPropOptimizer(learning_rate=0.001)
model.compile(optimizer, run_eagerly=test_utils.should_run_eagerly())
loss = model.test_on_batch(x)
self.assertAlmostEqual(0.01, loss, places=4)
def test_loss_on_model_fit(self):
inputs = Input(shape=(1, ))
targets = Input(shape=(1, ))
outputs = test_utils.Bias()(inputs)
model = Model([inputs, targets], outputs)
model.add_loss(MAE()(targets, outputs))
model.add_loss(tf.reduce_mean(mae(targets, outputs)))
model.compile(optimizer_v2.gradient_descent.SGD(0.05),
run_eagerly=test_utils.should_run_eagerly())
history = model.fit([self.x, self.y], batch_size=3, epochs=5)
self.assertAllClose(history.history['loss'], [2., 1.8, 1.6, 1.4, 1.2],
1e-3)
