def _clone_and_build_test_helper(self, model, model_type):
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
is_subclassed = (model_type == 'subclass')
# With placeholder creation
new_model = models.clone_and_build_model(
model, compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
# Create new tensors for inputs.
input_a = keras.Input(shape=(4,), name='a')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, compile_clone=True,
in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
new_model = models.clone_and_build_model(
model,
input_tensors=input_a,
target_tensors=None,
compile_clone=True,
in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
def _clone_and_build_test_helper(self, model, is_subclassed=False):
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
# Everything should work in a new session.
keras.backend.clear_session()
with self.cached_session():
# With placeholder creation
new_model = models.clone_and_build_model(
model, compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4,), name='a')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, compile_clone=True,
in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
target_a = keras.Input(shape=(4,), name='b')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, target_tensors=[target_a],
compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
def _clone_and_build_test_helper(self, model, is_subclassed=False):
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
# Everything should work in a new session.
keras.backend.clear_session()
with self.cached_session():
# With placeholder creation
new_model = models.clone_and_build_model(
model, compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4,), name='a')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, compile_clone=True,
in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
target_a = keras.Input(shape=(4,), name='b')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, target_tensors=[target_a],
compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
def _clone_and_build_test_helper(self, model, model_type):
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
is_subclassed = (model_type == 'subclass')
# With placeholder creation
new_model = models.clone_and_build_model(
model, compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4,), name='a')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, compile_clone=True,
in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
target_a = keras.Input(shape=(4,), name='b')
new_model = models.clone_and_build_model(
model, input_tensors=input_a, target_tensors=[target_a],
compile_clone=True, in_place_reset=is_subclassed)
self._assert_same_compile_params(new_model)
new_model.train_on_batch(inp, out)
new_model.evaluate(inp, out)
def _clone_and_build_model(mode,
keras_model,
custom_objects,
features=None,
labels=None):
"""Clone and build the given keras_model.
Args:
mode: training mode.
keras_model: an instance of compiled keras model.
custom_objects: Dictionary for custom objects.
features: Dict of tensors.
labels: Dict of tensors, or single tensor instance.
Returns:
The newly built model.
"""
# Set to True during training, False for inference or testing.
K.set_learning_phase(mode == model_fn_lib.ModeKeys.TRAIN)
input_tensors, target_tensors = _convert_estimator_io_to_keras(
keras_model, features, labels)
return models.clone_and_build_model(
keras_model,
input_tensors,
target_tensors,
custom_objects,
compile_clone=(mode != model_fn_lib.ModeKeys.PREDICT),
in_place_reset=(not keras_model._is_graph_network))
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.assertRaisesRegexp(ValueError, 'has not been compiled'):
models.clone_and_build_model(model, compile_clone=True)
is_subclassed = (testing_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.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile(
testing_utils.get_v2_optimizer('rmsprop'),
'mse',
run_eagerly=testing_utils.should_run_eagerly(),
run_distributed=testing_utils.should_run_distributed())
new_model.train_on_batch(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4, ))
target_a = keras.Input(shape=(4, ))
new_model = models.clone_and_build_model(model,
input_tensors=input_a,
target_tensors=[target_a],
compile_clone=False,
in_place_reset=is_subclassed)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile(
testing_utils.get_v2_optimizer('rmsprop'),
'mse',
run_eagerly=testing_utils.should_run_eagerly(),
run_distributed=testing_utils.should_run_distributed())
new_model.train_on_batch(inp, out)
def test_clone_and_build_non_compiled_model(self):
with self.cached_session():
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
model = keras.models.Sequential()
model.add(keras.layers.Dense(4, input_shape=(4, )))
model.add(keras.layers.BatchNormalization())
model.add(keras.layers.Dropout(0.5))
model.add(keras.layers.Dense(4))
# Everything should work in a new session.
keras.backend.clear_session()
with self.cached_session():
with self.assertRaisesRegexp(ValueError, 'has not been compiled'):
models.clone_and_build_model(model, compile_clone=True)
# With placeholder creation
new_model = models.clone_and_build_model(model,
compile_clone=False)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile('rmsprop', 'mse')
new_model.train_on_batch(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4, ))
target_a = keras.Input(shape=(4, ))
new_model = models.clone_and_build_model(model,
input_tensors=input_a,
target_tensors=[target_a],
compile_clone=False)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile('rmsprop', 'mse')
new_model.train_on_batch(inp, out)
def test_clone_optimizer_in_different_graph(self):
with ops.Graph().as_default():
with self.session():
model = testing_utils.get_small_sequential_mlp(3, 4)
optimizer = keras.optimizer_v2.adam.Adam()
model.compile(
optimizer, 'mse', metrics=['acc', metrics.categorical_accuracy],
)
model.fit(
x=np.array([[1., 2., 3., 4.]]),
y=np.array([[1., 1., 1., 1.]]),
epochs=1)
optimizer_config = optimizer.get_config()
with ops.Graph().as_default():
with self.session():
with self.assertRaisesRegex(ValueError, 'Cannot use the given session'):
models.clone_and_build_model(model, compile_clone=True)
# The optimizer_config object allows the model to be cloned in a
# different graph.
models.clone_and_build_model(model, compile_clone=True,
optimizer_config=optimizer_config)
def _clone_and_build_model(mode,
keras_model,
custom_objects,
features=None,
labels=None,
optimizer_config=None):
"""Clone and build the given keras_model.
Args:
mode: training mode.
keras_model: an instance of compiled keras model.
custom_objects: Dictionary for custom objects.
features: Dict of tensors.
labels: Dict of tensors, or single tensor instance.
optimizer_config: Optimizer config dictionary, returned by
`optimizer.get_config()`. This is used when cloning a model with
an optimizer. Since `_clone_and_build_model` is called in a different
graph and session from the model, `optimizer.get_config()` may raise an
error during the attempt to serialize the optimizer hyperparameter values.
Returns:
The newly built model.
"""
# Set to True during training, False for inference or testing.
K.set_learning_phase(mode == ModeKeys.TRAIN)
input_tensors, target_tensors, sample_weight_tensors = (
_convert_estimator_io_to_keras(keras_model, features, labels))
compile_clone = (mode != ModeKeys.PREDICT)
global_step = None
if compile_clone:
# Set iterations to the global step created by tf.train.create_global_step()
# which is automatically run in the estimator framework.
global_step = tf.compat.v1.train.get_or_create_global_step()
K.track_variable(global_step)
clone = models.clone_and_build_model(
keras_model,
input_tensors,
target_tensors,
custom_objects,
compile_clone=compile_clone,
in_place_reset=(not keras_model._is_graph_network),
optimizer_iterations=global_step,
optimizer_config=optimizer_config)
if sample_weight_tensors is not None:
sample_weight_tensors = training_utils.standardize_sample_weights(
sample_weight_tensors, clone.output_names)
# Update calculated loss (model.total_loss) to include sample weights.
clone._compile_weights_loss_and_weighted_metrics(sample_weight_tensors)
return clone
def test_clone_and_build_non_compiled_model(self):
with self.cached_session():
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
model = keras.models.Sequential()
model.add(keras.layers.Dense(4, input_shape=(4,)))
model.add(keras.layers.BatchNormalization())
model.add(keras.layers.Dropout(0.5))
model.add(keras.layers.Dense(4))
# Everything should work in a new session.
keras.backend.clear_session()
with self.cached_session():
with self.assertRaisesRegexp(ValueError, 'has not been compiled'):
models.clone_and_build_model(model, compile_clone=True)
# With placeholder creation
new_model = models.clone_and_build_model(model, compile_clone=False)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile('rmsprop', 'mse')
new_model.train_on_batch(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4,))
target_a = keras.Input(shape=(4,))
new_model = models.clone_and_build_model(model, input_tensors=input_a,
target_tensors=[target_a],
compile_clone=False)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile('rmsprop', 'mse')
new_model.train_on_batch(inp, out)
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.assertRaisesRegexp(ValueError, 'has not been compiled'):
models.clone_and_build_model(model, compile_clone=True)
is_subclassed = (testing_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.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile(
testing_utils.get_v2_optimizer('rmsprop'), 'mse',
run_eagerly=testing_utils.should_run_eagerly())
new_model.train_on_batch(inp, out)
# Create new tensors for inputs and targets
input_a = keras.Input(shape=(4,))
target_a = keras.Input(shape=(4,))
new_model = models.clone_and_build_model(
model, input_tensors=input_a, target_tensors=[target_a],
compile_clone=False, in_place_reset=is_subclassed)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.evaluate(inp, out)
with self.assertRaisesRegexp(RuntimeError, 'must compile'):
new_model.train_on_batch(inp, out)
new_model.compile(
testing_utils.get_v2_optimizer('rmsprop'), 'mse',
run_eagerly=testing_utils.should_run_eagerly())
new_model.train_on_batch(inp, out)
def assert_optimizer_iterations_increases(self, optimizer):
model = _get_model()
model.compile(
optimizer, 'mse', metrics=['acc', metrics.categorical_accuracy],
run_eagerly=testing_utils.should_run_eagerly())
global_step = keras.backend.variable(123, dtype=dtypes.int64)
clone_model = models.clone_and_build_model(
model, compile_clone=True, optimizer_iterations=global_step,
in_place_reset=(testing_utils.get_model_type() == 'subclass'))
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
clone_model.train_on_batch(inp, out)
self.assertEqual(K.eval(global_step), 124)
def assert_optimizer_iterations_increases(self, optimizer):
model = _get_model()
model.compile(
optimizer, 'mse', metrics=['acc', metrics.categorical_accuracy],
run_eagerly=testing_utils.should_run_eagerly())
global_step = keras.backend.variable(123, dtype=dtypes.int64)
clone_model = models.clone_and_build_model(
model, compile_clone=True, optimizer_iterations=global_step,
in_place_reset=(testing_utils.get_model_type() == 'subclass'))
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
clone_model.train_on_batch(inp, out)
self.assertEqual(K.eval(global_step), 124)
def _clone_and_build_model(mode,
keras_model,
custom_objects,
features=None,
labels=None):
"""Clone and build the given keras_model.
Args:
mode: training mode.
keras_model: an instance of compiled keras model.
custom_objects: Dictionary for custom objects.
features: Dict of tensors.
labels: Dict of tensors, or single tensor instance.
Returns:
The newly built model.
"""
# Set to True during training, False for inference or testing.
K.set_learning_phase(mode == ModeKeys.TRAIN)
input_tensors, target_tensors = _convert_estimator_io_to_keras(
keras_model, features, labels)
compile_clone = (mode != ModeKeys.PREDICT)
global_step = None
if compile_clone:
# Set iterations to the global step created by tf.train.create_global_step()
# which is automatically run in the estimator framework.
global_step = training_util.get_or_create_global_step()
K.track_variable(global_step)
clone = models.clone_and_build_model(
keras_model,
input_tensors,
target_tensors,
custom_objects,
compile_clone=compile_clone,
in_place_reset=(not keras_model._is_graph_network),
optimizer_iterations=global_step)
return clone
def _clone_and_build_model(mode,
keras_model,
custom_objects,
features=None,
labels=None):
"""Clone and build the given keras_model.
Args:
mode: training mode.
keras_model: an instance of compiled keras model.
custom_objects: Dictionary for custom objects.
features: Dict of tensors.
labels: Dict of tensors, or single tensor instance.
Returns:
The newly built model.
"""
# Set to True during training, False for inference or testing.
K.set_learning_phase(mode == model_fn_lib.ModeKeys.TRAIN)
input_tensors, target_tensors = _convert_estimator_io_to_keras(
keras_model, features, labels)
compile_clone = (mode != model_fn_lib.ModeKeys.PREDICT)
global_step = None
if compile_clone:
# Set iterations to the global step created by tf.train.create_global_step()
# which is automatically run in the estimator framework.
global_step = training_util.get_or_create_global_step()
K.track_variable(global_step)
clone = models.clone_and_build_model(
keras_model, input_tensors, target_tensors, custom_objects,
compile_clone=compile_clone,
in_place_reset=(not keras_model._is_graph_network),
optimizer_iterations=global_step)
return clone
def assert_optimizer_iterations_increases(self, optimizer):
with self.cached_session():
input_a = keras.Input(shape=(4,))
dense_1 = keras.layers.Dense(4,)
dense_2 = keras.layers.Dense(4,)
x_a = dense_1(input_a)
x_a = keras.layers.Dropout(0.5)(x_a)
x_a = keras.layers.BatchNormalization()(x_a)
x_a = dense_2(x_a)
model = keras.models.Model(input_a, x_a)
model.compile(optimizer, 'mse',
metrics=['acc', metrics.categorical_accuracy])
global_step = keras.backend.variable(123, dtype=dtypes.int64)
clone_model = models.clone_and_build_model(
model, compile_clone=True, optimizer_iterations=global_step)
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
clone_model.train_on_batch(inp, out)
self.assertEqual(K.eval(global_step), 124)
def assert_optimizer_iterations_increases(self, optimizer):
with self.cached_session():
input_a = keras.Input(shape=(4,))
dense_1 = keras.layers.Dense(4,)
dense_2 = keras.layers.Dense(4,)
x_a = dense_1(input_a)
x_a = keras.layers.Dropout(0.5)(x_a)
x_a = keras.layers.BatchNormalization()(x_a)
x_a = dense_2(x_a)
model = keras.models.Model(input_a, x_a)
model.compile(optimizer, 'mse',
metrics=['acc', metrics.categorical_accuracy])
global_step = keras.backend.variable(123, dtype=dtypes.int64)
clone_model = models.clone_and_build_model(
model, compile_clone=True, optimizer_iterations=global_step)
inp = np.random.random((10, 4))
out = np.random.random((10, 4))
clone_model.train_on_batch(inp, out)
self.assertEqual(K.eval(global_step), 124)
def _export_mode(
mode, has_saved_vars, builder, model, custom_objects, checkpoint_path):
"""Export a model, and optionally save new vars from the clone model.
Args:
mode: A `tf.estimator.ModeKeys` string.
has_saved_vars: A `boolean` indicating whether the SavedModel has already
exported variables.
builder: A `SavedModelBuilder` object.
model: A `tf.keras.Model` object.
custom_objects: A dictionary mapping string names to custom classes
or functions.
checkpoint_path: String path to checkpoint.
Raises:
ValueError: If the train/eval mode is being exported, but the model does
not have an optimizer.
"""
compile_clone = (mode != model_fn_lib.ModeKeys.PREDICT)
if compile_clone and not model.optimizer:
raise ValueError(
'Model does not have an optimizer. Cannot export mode %s' % mode)
model_graph = ops.get_default_graph()
with ops.Graph().as_default() as g:
K.set_learning_phase(mode == model_fn_lib.ModeKeys.TRAIN)
# Clone the model into blank graph. This will create placeholders for inputs
# and targets.
clone = models_lib.clone_and_build_model(
model, custom_objects=custom_objects, compile_clone=compile_clone)
# Make sure that iterations variable is added to the global step collection,
# to ensure that, when the SavedModel graph is loaded, the iterations
# variable is returned by `tf.train.get_global_step()`. This is required for
# compatibility with the SavedModelEstimator.
if compile_clone:
g.add_to_collection(ops.GraphKeys.GLOBAL_STEP, clone.optimizer.iterations)
# Extract update and train ops from train/test/predict functions.
train_op = None
if mode == model_fn_lib.ModeKeys.TRAIN:
clone._make_train_function()
train_op = clone.train_function.updates_op
elif mode == model_fn_lib.ModeKeys.EVAL:
clone._make_test_function()
else:
clone._make_predict_function()
g.get_collection_ref(ops.GraphKeys.UPDATE_OPS).extend(clone.state_updates)
clone_var_list = checkpointable_utils.named_saveables(clone)
with session.Session().as_default():
if has_saved_vars:
# Confirm all variables in the clone have an entry in the checkpoint.
status = clone.load_weights(checkpoint_path)
status.assert_existing_objects_matched()
else:
# Confirm that variables between the clone and model match up exactly,
# not counting optimizer objects. Optimizer objects are ignored because
# if the model has not trained, the slot variables will not have been
# created yet.
# TODO(b/113179535): Replace with checkpointable equivalence.
_assert_same_non_optimizer_objects(model, model_graph, clone, g)
# TODO(b/113178242): Use value transfer for checkpointable objects.
clone.load_weights(checkpoint_path)
# Add graph and variables to SavedModel.
# TODO(b/113134168): Switch to add_meta_graph_and_variables.
clone.save_weights(checkpoint_path, save_format='tf', overwrite=True)
builder._has_saved_variables = True
# Add graph to the SavedModel builder.
builder.add_meta_graph(
model_fn_lib.EXPORT_TAG_MAP[mode],
signature_def_map=_create_signature_def_map(clone, mode),
saver=saver_lib.Saver(clone_var_list),
init_op=variables.local_variables_initializer(),
train_op=train_op)
return None
def _export_mode(mode, has_saved_vars, builder, model, custom_objects,
checkpoint_path, input_signature):
"""Exports a model, and optionally saves new vars from the clone model.
Args:
mode: A `tf.estimator.ModeKeys` string.
has_saved_vars: A `boolean` indicating whether the SavedModel has already
exported variables.
builder: A `SavedModelBuilder` object.
model: A `tf.keras.Model` object.
custom_objects: A dictionary mapping string names to custom classes
or functions.
checkpoint_path: String path to checkpoint.
input_signature: Nested TensorSpec containing the expected inputs. Can be
`None`, in which case the signature will be inferred from the model.
Raises:
ValueError: If the train/eval mode is being exported, but the model does
not have an optimizer.
"""
from tensorflow.python.keras import models as models_lib # pylint: disable=g-import-not-at-top
compile_clone = (mode != mode_keys.ModeKeys.PREDICT)
if compile_clone and not model.optimizer:
raise ValueError(
'Model does not have an optimizer. Cannot export mode %s' % mode)
model_graph = ops.get_default_graph()
with ops.Graph().as_default() as g, K.learning_phase_scope(
mode == mode_keys.ModeKeys.TRAIN):
if input_signature is None:
input_tensors = None
else:
input_tensors = nest.map_structure(create_placeholder,
input_signature)
# Clone the model into blank graph. This will create placeholders for inputs
# and targets.
clone = models_lib.clone_and_build_model(model,
input_tensors=input_tensors,
custom_objects=custom_objects,
compile_clone=compile_clone)
# Make sure that iterations variable is added to the global step collection,
# to ensure that, when the SavedModel graph is loaded, the iterations
# variable is returned by `tf.train.get_global_step()`. This is required for
# compatibility with the SavedModelEstimator.
if compile_clone:
g.add_to_collection(ops.GraphKeys.GLOBAL_STEP,
clone.optimizer.iterations)
# Extract update and train ops from train/test/predict functions.
train_op = None
if mode == mode_keys.ModeKeys.TRAIN:
clone._make_train_function()
train_op = clone.train_function.updates_op
elif mode == mode_keys.ModeKeys.TEST:
clone._make_test_function()
else:
clone._make_predict_function()
g.get_collection_ref(ops.GraphKeys.UPDATE_OPS).extend(
clone.state_updates)
clone_var_list = checkpointable_utils.named_saveables(clone)
with session.Session().as_default():
if has_saved_vars:
# Confirm all variables in the clone have an entry in the checkpoint.
status = clone.load_weights(checkpoint_path)
status.assert_existing_objects_matched()
else:
# Confirm that variables between the clone and model match up exactly,
# not counting optimizer objects. Optimizer objects are ignored because
# if the model has not trained, the slot variables will not have been
# created yet.
# TODO(b/113179535): Replace with checkpointable equivalence.
_assert_same_non_optimizer_objects(model, model_graph, clone,
g)
# TODO(b/113178242): Use value transfer for checkpointable objects.
clone.load_weights(checkpoint_path)
# Add graph and variables to SavedModel.
# TODO(b/113134168): Switch to add_meta_graph_and_variables.
clone.save_weights(checkpoint_path,
save_format='tf',
overwrite=True)
builder._has_saved_variables = True
# Add graph to the SavedModel builder.
builder.add_meta_graph(model_utils.EXPORT_TAG_MAP[mode],
signature_def_map=_create_signature_def_map(
clone, mode),
saver=saver_lib.Saver(clone_var_list),
init_op=variables.local_variables_initializer(),
train_op=train_op)
return None