def testObjectsCombined(self): # Currently fine to load two checkpoint objects into one Python object checkpoint_directory = self.get_temp_dir() save_root = checkpointable.Checkpointable() save_root.dep_one = checkpointable.Checkpointable() save_root.dep_two = checkpointable.Checkpointable() checkpointable_utils.add_variable( save_root.dep_one, name="var1", initializer=32., dtype=dtypes.float64) checkpointable_utils.add_variable( save_root.dep_two, name="var2", initializer=64., dtype=dtypes.float64) self.evaluate(checkpointable_utils.gather_initializers(save_root)) save_path = checkpointable_utils.CheckpointableSaver(save_root).save( os.path.join(checkpoint_directory, "ckpt")) load_root = checkpointable.Checkpointable() load_root.dep_one = checkpointable.Checkpointable() load_root.dep_two = load_root.dep_one v1 = checkpointable_utils.add_variable( load_root.dep_one, name="var1", shape=[], dtype=dtypes.float64) v2 = checkpointable_utils.add_variable( load_root.dep_one, name="var2", shape=[], dtype=dtypes.float64) status = checkpointable_utils.CheckpointableSaver(load_root).restore( save_path).assert_consumed() status.run_restore_ops() self.assertEqual(32., self.evaluate(v1)) self.assertEqual(64., self.evaluate(v2))
def testAddVariable(self): obj = NonLayerCheckpointable() with self.assertRaisesRegexp(ValueError, "do not specify shape"): checkpointable_utils.add_variable( obj, name="shape_specified_twice", shape=[], initializer=1) constant_initializer = checkpointable_utils.add_variable( obj, name="constant_initializer", initializer=1) with variable_scope.variable_scope("some_variable_scope"): ones_initializer = checkpointable_utils.add_variable( obj, name="ones_initializer", shape=[2], initializer=init_ops.ones_initializer(dtype=dtypes.float32)) bare_initializer = checkpointable_utils.add_variable( obj, name="bare_initializer", shape=[2, 2], dtype=dtypes.float64, initializer=init_ops.zeros_initializer) # Even in graph mode, there are no naming conflicts between objects, only # naming conflicts within an object. other_duplicate = resource_variable_ops.ResourceVariable( name="duplicate", initial_value=1.) duplicate = checkpointable_utils.add_variable( obj, name="duplicate", shape=[]) with self.assertRaisesRegexp(ValueError, "'duplicate' already exists"): checkpointable_utils.add_variable(obj, name="duplicate", shape=[]) self.evaluate(checkpointable_utils.gather_initializers(obj)) self.assertEqual("constant_initializer:0", constant_initializer.name) self.assertEqual(1, self.evaluate(constant_initializer)) self.assertEqual("some_variable_scope/ones_initializer:0", ones_initializer.name) self.assertAllEqual([1, 1], self.evaluate(ones_initializer)) self.assertAllEqual([[0., 0.], [0., 0.]], self.evaluate(bare_initializer)) self.assertEqual("a_variable:0", obj.a_variable.name) self.assertEqual("duplicate:0", other_duplicate.name) if context.in_graph_mode(): # The .name attribute may be globally influenced, but the checkpoint name # won't be (tested below). self.assertEqual("duplicate_1:0", duplicate.name) else: # When executing eagerly, there's no uniquification of variable names. The # checkpoint name will be the same. self.assertEqual("duplicate:0", duplicate.name) named_variables, _ = checkpointable_utils._serialize_object_graph(obj) expected_checkpoint_names = ( "a_variable/.ATTRIBUTES/VARIABLE_VALUE", "bare_initializer/.ATTRIBUTES/VARIABLE_VALUE", "constant_initializer/.ATTRIBUTES/VARIABLE_VALUE", "duplicate/.ATTRIBUTES/VARIABLE_VALUE", "ones_initializer/.ATTRIBUTES/VARIABLE_VALUE", ) six.assertCountEqual( self, expected_checkpoint_names, named_variables.keys())
def testMultipleGraphsNonSlotVariables(self): with context.graph_mode(): checkpoint_directory = self.get_temp_dir() checkpoint_prefix = os.path.join(checkpoint_directory, "ckpt") optimizer = adam.AdamOptimizer(0.001) # Construct a model in one graph first_graph = ops.Graph() first_session = session_lib.Session(graph=first_graph) with first_graph.as_default(), first_session.as_default(): first_variable = resource_variable_ops.ResourceVariable([1.]) first_root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, variable=first_variable) train_op = optimizer.minimize(first_variable.read_value) self.evaluate(checkpointable_utils.gather_initializers( first_root_checkpointable)) self.evaluate(train_op) self.evaluate(first_variable.assign([1.])) self.evaluate(optimizer.get_slot( var=first_variable, name="m").assign([2.])) beta1_power, _ = optimizer._get_beta_accumulators() self.evaluate(beta1_power.assign(3.)) # Save and load in a second graph second_graph = ops.Graph() with second_graph.as_default(), session_lib.Session(graph=second_graph): second_variable = resource_variable_ops.ResourceVariable([1.]) second_root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, variable=second_variable) train_op = optimizer.minimize(second_variable.read_value) second_root_checkpointable.restore(None).initialize_or_restore() self.evaluate(train_op) self.evaluate(second_variable.assign([4.])) self.evaluate(optimizer.get_slot( var=second_variable, name="m").assign([5.])) beta1_power, _ = optimizer._get_beta_accumulators() self.evaluate(beta1_power.assign(6.)) save_path = second_root_checkpointable.save(checkpoint_prefix) self.evaluate(second_variable.assign([7.])) self.evaluate(optimizer.get_slot( var=second_variable, name="m").assign([8.])) beta1_power, _ = optimizer._get_beta_accumulators() self.assertAllEqual(6., self.evaluate(beta1_power)) status = second_root_checkpointable.restore(save_path) status.assert_consumed().run_restore_ops() self.assertAllEqual([4.], self.evaluate(second_variable)) self.assertAllEqual([5.], self.evaluate(optimizer.get_slot( var=second_variable, name="m"))) beta1_power, _ = optimizer._get_beta_accumulators() self.assertAllEqual(6., self.evaluate(beta1_power)) # Check that the first graph is unmolested with first_graph.as_default(), first_session.as_default(): self.assertAllEqual([1.], self.evaluate(first_variable)) self.assertAllEqual([2.], self.evaluate(optimizer.get_slot( var=first_variable, name="m"))) beta1_power, _ = optimizer._get_beta_accumulators() self.assertAllEqual(3., self.evaluate(beta1_power))
def testSaveRestore(self): network = MyNetwork() optimizer = adam.AdamOptimizer(0.001) root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, network=network) input_value = constant_op.constant([[3.]]) if context.in_eager_mode(): optimizer.minimize( lambda: network(input_value)) else: train_op = optimizer.minimize(network(input_value)) # TODO(allenl): Make initialization more pleasant when graph building. root_checkpointable.save_counter # pylint: disable=pointless-statement self.evaluate(checkpointable_utils.gather_initializers( root_checkpointable)) self.evaluate(train_op) prefix = os.path.join(self.get_temp_dir(), "ckpt") self.evaluate(state_ops.assign(network._named_dense.variables[1], [42.])) m_bias_slot = optimizer.get_slot(network._named_dense.variables[1], "m") self.evaluate(state_ops.assign(m_bias_slot, [1.5])) save_path = root_checkpointable.save(file_prefix=prefix) self.evaluate(state_ops.assign(network._named_dense.variables[1], [43.])) self.evaluate(state_ops.assign(root_checkpointable.save_counter, 3)) optimizer_variables = self.evaluate(optimizer.variables()) self.evaluate(state_ops.assign(m_bias_slot, [-2.])) # Immediate restoration status = root_checkpointable.restore(save_path=save_path).assert_consumed() status.run_restore_ops() self.assertAllEqual([42.], self.evaluate(network._named_dense.variables[1])) self.assertAllEqual(1, self.evaluate(root_checkpointable.save_counter)) self.assertAllEqual([1.5], self.evaluate(m_bias_slot)) if context.in_graph_mode(): return # Restore-on-create is only supported when executing eagerly on_create_network = MyNetwork() on_create_optimizer = adam.AdamOptimizer(0.001) on_create_root = checkpointable_utils.Checkpoint( optimizer=on_create_optimizer, network=on_create_network) # Deferred restoration status = on_create_root.restore(save_path=save_path) on_create_network(constant_op.constant([[3.]])) # create variables self.assertAllEqual(1, self.evaluate(on_create_root.save_counter)) self.assertAllEqual([42.], self.evaluate( on_create_network._named_dense.variables[1])) on_create_m_bias_slot = on_create_optimizer.get_slot( on_create_network._named_dense.variables[1], "m") # Optimizer slot variables are created when the original variable is # restored. self.assertAllEqual([1.5], self.evaluate(on_create_m_bias_slot)) self.assertAllEqual(optimizer_variables[2:], self.evaluate(on_create_optimizer.variables())) on_create_optimizer._create_slots( [resource_variable_ops.ResourceVariable([1.])]) status.assert_consumed() beta1_power, beta2_power = on_create_optimizer._get_beta_accumulators() self.assertAllEqual(optimizer_variables[0], self.evaluate(beta1_power)) self.assertAllEqual(optimizer_variables[1], self.evaluate(beta2_power))
def testManySavesGraph(self): """Saves after the first should not modify the graph.""" with context.graph_mode(): graph = ops.Graph() with graph.as_default(), self.test_session(graph): checkpoint_directory = self.get_temp_dir() checkpoint_prefix = os.path.join(checkpoint_directory, "ckpt") obj = checkpointable.Checkpointable() obj.var = variable_scope.get_variable(name="v", initializer=0.) obj.opt = adam.AdamOptimizer(0.1) obj.opt.minimize(obj.var.read_value()) self.evaluate(checkpointable_utils.gather_initializers(obj)) saver = checkpointable_utils.CheckpointableSaver(obj) saver.save(checkpoint_prefix) before_ops = graph.get_operations() saver.save(checkpoint_prefix) self.assertEqual(before_ops, graph.get_operations())
def testDependencyLoop(self): # Note: this test creates garbage during eager execution because it # purposefully creates a reference cycle. first = checkpointable.Checkpointable() second = checkpointable.Checkpointable() first.second = second second.first = first first.v = checkpointable_utils.add_variable( first, "v1", initializer=[3., 1., 4.]) second.v = checkpointable_utils.add_variable( second, "v2", initializer=[1., 1., 2., 3.]) self.evaluate(checkpointable_utils.gather_initializers(first)) checkpoint_directory = self.get_temp_dir() save_path = checkpointable_utils.CheckpointableSaver(first).save( os.path.join(checkpoint_directory, "ckpt")) # Test deferred loading first_load = checkpointable.Checkpointable() status = checkpointable_utils.CheckpointableSaver( first_load).restore(save_path) second_load = checkpointable.Checkpointable() first_load.second = second_load second_load.first = first_load with self.assertRaises(AssertionError): status.assert_consumed() first_load.v = checkpointable_utils.add_variable( first_load, "v1", shape=[3]) second_load.v = checkpointable_utils.add_variable( second_load, "v2", shape=[4]) status.assert_consumed() status.run_restore_ops() self.assertAllEqual([3., 1., 4.], self.evaluate(first_load.v)) self.assertAllEqual([1., 1., 2., 3.], self.evaluate(second_load.v)) # Test loading when variables have already been created self.evaluate(first_load.v.assign([2., 7., 1.])) self.assertAllEqual([2., 7., 1.], self.evaluate(first_load.v)) self.evaluate(second_load.v.assign([2., 7., 1., 8.])) self.assertAllEqual([2., 7., 1., 8.], self.evaluate(second_load.v)) status = checkpointable_utils.CheckpointableSaver(first_load).restore( save_path).assert_consumed() status.run_restore_ops() self.assertAllEqual([3., 1., 4.], self.evaluate(first_load.v)) self.assertAllEqual([1., 1., 2., 3.], self.evaluate(second_load.v))
def _initialized_model(self): input_value = constant_op.constant([[3.]]) network = MyNetwork() optimizer = adam.AdamOptimizer(0.001) optimizer_step = training_util.get_or_create_global_step() root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, network=network, optimizer_step=optimizer_step) train_op = optimizer.minimize( functools.partial(network, input_value), global_step=optimizer_step) self.evaluate(checkpointable_utils.gather_initializers( root_checkpointable)) self.evaluate(train_op) # A regular variable, a slot variable, and a non-slot Optimizer variable # with known values to check when loading. self.evaluate(network._named_dense.bias.assign([1.])) self.evaluate(optimizer.get_slot( var=network._named_dense.bias, name="m").assign([2.])) beta1_power, _ = optimizer._get_beta_accumulators() self.evaluate(beta1_power.assign(3.)) return root_checkpointable
def testAmbiguousLoad(self): # Not OK to split one checkpoint object into two checkpoint_directory = self.get_temp_dir() save_root = checkpointable.Checkpointable() save_root.dep_one = checkpointable.Checkpointable() save_root.dep_two = checkpointable.Checkpointable() dep_three = checkpointable.Checkpointable() save_root.dep_one.dep_three = dep_three save_root.dep_two.dep_three = dep_three checkpointable_utils.add_variable(dep_three, name="var", initializer=0.) self.evaluate(checkpointable_utils.gather_initializers(save_root)) save_path = checkpointable_utils.CheckpointableSaver(save_root).save( os.path.join(checkpoint_directory, "ckpt")) load_root = checkpointable.Checkpointable() checkpointable_utils.CheckpointableSaver(load_root).restore(save_path) load_root.dep_one = checkpointable.Checkpointable() load_root.dep_two = checkpointable.Checkpointable() load_root.dep_one.dep_three = checkpointable.Checkpointable() with self.assertRaisesRegexp(AssertionError, "resolved to different objects"): load_root.dep_two.dep_three = checkpointable.Checkpointable()
def testDeferredSlotRestoration(self): checkpoint_directory = self.get_temp_dir() root = checkpointable.Checkpointable() root.var = checkpointable_utils.add_variable( root, name="var", initializer=0.) optimizer = adam.AdamOptimizer(0.1) if context.in_graph_mode(): train_op = optimizer.minimize(root.var) # Note that `optimizer` has not been added as a dependency of # `root`. Create a one-off grouping so that slot variables for `root.var` # get initialized too. self.evaluate(checkpointable_utils.gather_initializers( checkpointable_utils.Checkpoint(root=root, optimizer=optimizer))) self.evaluate(train_op) else: optimizer.minimize(root.var.read_value) self.evaluate(state_ops.assign(root.var, 12.)) no_slots_path = checkpointable_utils.CheckpointableSaver(root).save( os.path.join(checkpoint_directory, "no_slots")) root.optimizer = optimizer self.evaluate(state_ops.assign(root.var, 13.)) self.evaluate(state_ops.assign(optimizer.get_slot(name="m", var=root.var), 14.)) slots_path = checkpointable_utils.CheckpointableSaver(root).save( os.path.join(checkpoint_directory, "with_slots")) new_root = checkpointable.Checkpointable() # Load the slot-containing checkpoint (deferred), then immediately overwrite # the non-slot variable (also deferred). slot_status = checkpointable_utils.CheckpointableSaver( new_root).restore(slots_path) no_slot_status = checkpointable_utils.CheckpointableSaver( new_root).restore(no_slots_path) with self.assertRaises(AssertionError): no_slot_status.assert_consumed() new_root.var = checkpointable_utils.add_variable( new_root, name="var", shape=[]) no_slot_status.assert_consumed() no_slot_status.run_restore_ops() self.assertEqual(12., self.evaluate(new_root.var)) new_root.optimizer = adam.AdamOptimizer(0.1) with self.assertRaisesRegexp(AssertionError, "beta1_power"): slot_status.assert_consumed() self.assertEqual(12., self.evaluate(new_root.var)) if context.in_eager_mode(): # Slot variables are only created with restoring initializers when # executing eagerly. self.assertEqual(14., self.evaluate( new_root.optimizer.get_slot(name="m", var=new_root.var))) else: self.assertIs(new_root.optimizer.get_slot(name="m", var=new_root.var), None) if context.in_graph_mode(): train_op = new_root.optimizer.minimize(new_root.var) # The slot variable now exists; restore() didn't create it, but we should # now have a restore op for it. slot_status.run_restore_ops() self.assertEqual(14., self.evaluate( new_root.optimizer.get_slot(name="m", var=new_root.var))) self.evaluate(train_op) else: new_root.optimizer.minimize(new_root.var.read_value) slot_status.assert_consumed()
def testNamingWithOptimizer(self): input_value = constant_op.constant([[3.]]) network = MyNetwork() # A nuisance Network using the same optimizer. Its slot variables should not # go in the checkpoint, since it is never depended on. other_network = MyNetwork() optimizer = adam.AdamOptimizer(0.001) optimizer_step = training_util.get_or_create_global_step() root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, network=network, optimizer_step=optimizer_step) if context.in_eager_mode(): optimizer.minimize( lambda: network(input_value), global_step=optimizer_step) optimizer.minimize( lambda: other_network(input_value), global_step=optimizer_step) else: train_op = optimizer.minimize( network(input_value), global_step=optimizer_step) optimizer.minimize( other_network(input_value), global_step=optimizer_step) self.evaluate(checkpointable_utils.gather_initializers( root_checkpointable)) self.evaluate(train_op) named_variables, serialized_graph = ( checkpointable_utils._serialize_object_graph(root_checkpointable)) expected_checkpoint_names = ( # Created in the root node, so no prefix. "optimizer_step", # No name provided to track_checkpointable(), so the position is used # instead (one-based). "network/via_track_layer/kernel", # track_checkpointable() with a name provided, so that's used "network/_named_dense/kernel", "network/_named_dense/bias", # non-Layer dependency of the network "network/_non_layer/a_variable", # The optimizer creates two non-slot variables "optimizer/beta1_power", "optimizer/beta2_power", # Slot variables "network/via_track_layer/kernel/.OPTIMIZER_SLOT/optimizer/m", "network/via_track_layer/kernel/.OPTIMIZER_SLOT/optimizer/v", "network/_named_dense/kernel/.OPTIMIZER_SLOT/optimizer/m", "network/_named_dense/kernel/.OPTIMIZER_SLOT/optimizer/v", "network/_named_dense/bias/.OPTIMIZER_SLOT/optimizer/m", "network/_named_dense/bias/.OPTIMIZER_SLOT/optimizer/v", ) suffix = "/.ATTRIBUTES/VARIABLE_VALUE" expected_checkpoint_names = [ name + suffix for name in expected_checkpoint_names] six.assertCountEqual(self, expected_checkpoint_names, named_variables.keys()) # Check that we've mapped to the right variable objects (not exhaustive) self.assertEqual( "global_step:0", named_variables["optimizer_step" + suffix].name) self.assertEqual( "my_network/dense_1/kernel:0", named_variables["network/via_track_layer/kernel" + suffix].name) self.assertEqual( "my_network/dense/kernel:0", named_variables["network/_named_dense/kernel" + suffix].name) self.assertEqual( "beta1_power:0", named_variables["optimizer/beta1_power" + suffix].name) self.assertEqual( "beta2_power:0", named_variables["optimizer/beta2_power" + suffix].name) # Spot check the generated protocol buffers. self.assertEqual("optimizer", serialized_graph.nodes[0].children[1].local_name) optimizer_node = serialized_graph.nodes[serialized_graph.nodes[0].children[ 1].node_id] self.assertEqual("beta1_power", optimizer_node.children[0].local_name) self.assertEqual("beta1_power", serialized_graph.nodes[optimizer_node.children[0].node_id] .attributes[0].full_name) self.assertEqual( "my_network/dense/kernel", serialized_graph.nodes[optimizer_node.slot_variables[0] .original_variable_node_id] .attributes[0].full_name) # We strip off the :0 suffix, as variable.name-based saving does. self.assertEqual( "my_network/dense/kernel/Adam", serialized_graph.nodes[optimizer_node.slot_variables[0] .slot_variable_node_id] .attributes[0].full_name) self.assertEqual( "my_network/dense/kernel/Adam:0", optimizer.get_slot( var=named_variables["network/_named_dense/kernel" + suffix], name="m").name) self.assertEqual( "network/_named_dense/kernel" + suffix, serialized_graph.nodes[ optimizer_node.slot_variables[0] .original_variable_node_id].attributes[0].checkpoint_key) self.assertEqual("m", optimizer_node.slot_variables[0].slot_name) self.assertEqual( "network/_named_dense/kernel/.OPTIMIZER_SLOT/optimizer/m" + suffix, serialized_graph.nodes[ optimizer_node.slot_variables[0] .slot_variable_node_id].attributes[0].checkpoint_key)
def testSaveRestore(self): model = MyModel() optimizer = adam.AdamOptimizer(0.001) root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, model=model) input_value = constant_op.constant([[3.]]) if context.executing_eagerly(): optimizer.minimize(lambda: model(input_value)) else: train_op = optimizer.minimize(model(input_value)) # TODO(allenl): Make initialization more pleasant when graph building. root_checkpointable.save_counter # pylint: disable=pointless-statement self.evaluate( checkpointable_utils.gather_initializers(root_checkpointable)) self.evaluate(train_op) prefix = os.path.join(self.get_temp_dir(), "ckpt") self.evaluate(state_ops.assign(model._named_dense.variables[1], [42.])) m_bias_slot = optimizer.get_slot(model._named_dense.variables[1], "m") self.evaluate(state_ops.assign(m_bias_slot, [1.5])) save_path = root_checkpointable.save(file_prefix=prefix) self.evaluate(state_ops.assign(model._named_dense.variables[1], [43.])) self.evaluate(state_ops.assign(root_checkpointable.save_counter, 3)) optimizer_variables = self.evaluate(optimizer.variables()) self.evaluate(state_ops.assign(m_bias_slot, [-2.])) # Immediate restoration status = root_checkpointable.restore( save_path=save_path).assert_consumed() status.run_restore_ops() self.assertAllEqual([42.], self.evaluate(model._named_dense.variables[1])) self.assertAllEqual(1, self.evaluate(root_checkpointable.save_counter)) self.assertAllEqual([1.5], self.evaluate(m_bias_slot)) if not context.executing_eagerly(): return # Restore-on-create is only supported when executing eagerly on_create_model = MyModel() on_create_optimizer = adam.AdamOptimizer( 0.001, # Preserve beta1_power and beta2_power when appying gradients so we can # test that they've been restored correctly. beta1=1.0, beta2=1.0) on_create_root = checkpointable_utils.Checkpoint( optimizer=on_create_optimizer, model=on_create_model) # Deferred restoration status = on_create_root.restore(save_path=save_path) on_create_model(constant_op.constant([[3.]])) # create variables self.assertAllEqual(1, self.evaluate(on_create_root.save_counter)) self.assertAllEqual([42.], self.evaluate( on_create_model._named_dense.variables[1])) on_create_m_bias_slot = on_create_optimizer.get_slot( on_create_model._named_dense.variables[1], "m") # Optimizer slot variables are created when the original variable is # restored. self.assertAllEqual([1.5], self.evaluate(on_create_m_bias_slot)) self.assertAllEqual(optimizer_variables[2:], self.evaluate(on_create_optimizer.variables())) dummy_var = resource_variable_ops.ResourceVariable([1.]) on_create_optimizer.minimize(loss=dummy_var.read_value) status.assert_consumed() beta1_power, beta2_power = on_create_optimizer._get_beta_accumulators() self.assertAllEqual(optimizer_variables[0], self.evaluate(beta1_power)) self.assertAllEqual(optimizer_variables[1], self.evaluate(beta2_power))
def testSaveRestore(self): model = MyModel() optimizer = adam.AdamOptimizer(0.001) root_checkpointable = checkpointable_utils.Checkpoint( optimizer=optimizer, model=model) input_value = constant_op.constant([[3.]]) if context.executing_eagerly(): optimizer.minimize( lambda: model(input_value)) else: train_op = optimizer.minimize(model(input_value)) # TODO(allenl): Make initialization more pleasant when graph building. root_checkpointable.save_counter # pylint: disable=pointless-statement self.evaluate(checkpointable_utils.gather_initializers( root_checkpointable)) self.evaluate(train_op) prefix = os.path.join(self.get_temp_dir(), "ckpt") self.evaluate(state_ops.assign(model._named_dense.variables[1], [42.])) m_bias_slot = optimizer.get_slot(model._named_dense.variables[1], "m") self.evaluate(state_ops.assign(m_bias_slot, [1.5])) save_path = root_checkpointable.save(file_prefix=prefix) self.evaluate(state_ops.assign(model._named_dense.variables[1], [43.])) self.evaluate(state_ops.assign(root_checkpointable.save_counter, 3)) optimizer_variables = self.evaluate(optimizer.variables()) self.evaluate(state_ops.assign(m_bias_slot, [-2.])) # Immediate restoration status = root_checkpointable.restore(save_path=save_path).assert_consumed() status.run_restore_ops() self.assertAllEqual([42.], self.evaluate(model._named_dense.variables[1])) self.assertAllEqual(1, self.evaluate(root_checkpointable.save_counter)) self.assertAllEqual([1.5], self.evaluate(m_bias_slot)) if not context.executing_eagerly(): return # Restore-on-create is only supported when executing eagerly on_create_model = MyModel() on_create_optimizer = adam.AdamOptimizer( 0.001, # Preserve beta1_power and beta2_power when appying gradients so we can # test that they've been restored correctly. beta1=1.0, beta2=1.0) on_create_root = checkpointable_utils.Checkpoint( optimizer=on_create_optimizer, model=on_create_model) # Deferred restoration status = on_create_root.restore(save_path=save_path) on_create_model(constant_op.constant([[3.]])) # create variables self.assertAllEqual(1, self.evaluate(on_create_root.save_counter)) self.assertAllEqual([42.], self.evaluate( on_create_model._named_dense.variables[1])) on_create_m_bias_slot = on_create_optimizer.get_slot( on_create_model._named_dense.variables[1], "m") # Optimizer slot variables are created when the original variable is # restored. self.assertAllEqual([1.5], self.evaluate(on_create_m_bias_slot)) self.assertAllEqual(optimizer_variables[2:], self.evaluate(on_create_optimizer.variables())) dummy_var = resource_variable_ops.ResourceVariable([1.]) on_create_optimizer.minimize(loss=dummy_var.read_value) status.assert_consumed() beta1_power, beta2_power = on_create_optimizer._get_beta_accumulators() self.assertAllEqual(optimizer_variables[0], self.evaluate(beta1_power)) self.assertAllEqual(optimizer_variables[1], self.evaluate(beta2_power))