def testOneTimeSeriesFeature(self):
# Build config.
feature_spec = {
"time_feature_1": {
"length": 10,
"is_time_series": True,
}
}
config = configurations.base()
config["inputs"]["features"] = feature_spec
config = configdict.ConfigDict(config)
# Build model.
features = input_ops.build_feature_placeholders(config.inputs.features)
labels = input_ops.build_labels_placeholder()
model = astro_model.AstroModel(features, labels, config.hparams,
tf.estimator.ModeKeys.TRAIN)
model.build()
# Validate hidden layers.
self.assertItemsEqual(["time_feature_1"],
model.time_series_hidden_layers.keys())
self.assertIs(model.time_series_features["time_feature_1"],
model.time_series_hidden_layers["time_feature_1"])
self.assertEqual(len(model.aux_hidden_layers), 0)
self.assertIs(model.time_series_features["time_feature_1"],
model.pre_logits_concat)
def testZeroHiddenLayers(self):
# Build config.
feature_spec = {
"time_feature_1": {
"length": 10,
"is_time_series": True,
},
"time_feature_2": {
"length": 10,
"is_time_series": True,
},
"aux_feature_1": {
"length": 1,
"is_time_series": False,
},
}
config = configurations.base()
config["inputs"]["features"] = feature_spec
config = configdict.ConfigDict(config)
config.hparams.output_dim = 1
config.hparams.num_pre_logits_hidden_layers = 0
# Build model.
features = input_ops.build_feature_placeholders(config.inputs.features)
labels = input_ops.build_labels_placeholder()
model = astro_model.AstroModel(features, labels, config.hparams,
tf.estimator.ModeKeys.TRAIN)
model.build()
# Validate Tensor shapes.
self.assertShapeEquals((None, 21), model.pre_logits_concat)
logits_w = testing.get_variable_by_name("logits/kernel")
self.assertShapeEquals((21, 1), logits_w)
def testInvalidModeRaisesError(self):
# Build config.
config = configdict.ConfigDict(configurations.base())
# Build model.
features = input_ops.build_feature_placeholders(config.inputs.features)
labels = input_ops.build_labels_placeholder()
with self.assertRaises(ValueError):
_ = astro_model.AstroModel(features, labels, config.hparams, "training")
def testZeroFeaturesRaisesError(self):
# Build config.
config = configurations.base()
config["inputs"]["features"] = {}
config = configdict.ConfigDict(config)
# Build model.
features = input_ops.build_feature_placeholders(config.inputs.features)
labels = input_ops.build_labels_placeholder()
model = astro_model.AstroModel(features, labels, config.hparams,
tf.estimator.ModeKeys.TRAIN)
with self.assertRaises(ValueError):
# Raises ValueError because at least one feature is required.
model.build()
def testEvalMode(self):
# Build config.
feature_spec = {
"time_feature_1": {
"length": 10,
"is_time_series": True,
},
"time_feature_2": {
"length": 10,
"is_time_series": True,
},
"aux_feature_1": {
"length": 1,
"is_time_series": False,
},
}
config = configurations.base()
config["inputs"]["features"] = feature_spec
config = configdict.ConfigDict(config)
config.hparams.output_dim = 1
# Build model.
features = input_ops.build_feature_placeholders(config.inputs.features)
labels = input_ops.build_labels_placeholder()
model = astro_model.AstroModel(features, labels, config.hparams,
tf.estimator.ModeKeys.TRAIN)
model.build()
# Validate Tensor shapes.
self.assertShapeEquals((None, 21), model.pre_logits_concat)
self.assertShapeEquals((None, 1), model.logits)
self.assertShapeEquals((None, 1), model.predictions)
self.assertShapeEquals((None, ), model.batch_losses)
self.assertShapeEquals((), model.total_loss)
# Execute the TensorFlow graph.
scaffold = tf.train.Scaffold()
scaffold.finalize()
with self.session() as sess:
sess.run([scaffold.init_op, scaffold.local_init_op])
step = sess.run(model.global_step)
self.assertEqual(0, step)
# Fetch total loss.
features = testing.fake_features(feature_spec, batch_size=16)
labels = testing.fake_labels(config.hparams.output_dim,
batch_size=16)
feed_dict = input_ops.prepare_feed_dict(model, features, labels)
total_loss = sess.run(model.total_loss, feed_dict=feed_dict)
self.assertShapeEquals((), total_loss)
def testTwoHiddenLayers(self):
# Build config.
feature_spec = {
"time_feature_1": {
"length": 10,
"is_time_series": True,
},
"time_feature_2": {
"length": 10,
"is_time_series": True,
},
"aux_feature_1": {
"length": 1,
"is_time_series": False,
},
}
config = configurations.base()
config["inputs"]["features"] = feature_spec
config = configdict.ConfigDict(config)
config.hparams.output_dim = 1
config.hparams.num_pre_logits_hidden_layers = 2
config.hparams.pre_logits_hidden_layer_size = 5
# Build model.
features = input_ops.build_feature_placeholders(config.inputs.features)
labels = input_ops.build_labels_placeholder()
model = astro_model.AstroModel(features, labels, config.hparams,
tf.estimator.ModeKeys.TRAIN)
model.build()
# TODO(shallue): TensorFlow 2.0 doesn't have global variable collections.
# If we want to keep testing variable shapes in 2.0, we must keep track of
# the individual Keras Layer objects in the model class.
variables = {v.op.name: v for v in tf.global_variables()}
# Validate Tensor shapes.
self.assertShapeEquals((None, 21), model.pre_logits_concat)
fc1 = variables["pre_logits_hidden/fully_connected_1/kernel"]
self.assertShapeEquals((21, 5), fc1)
fc2 = variables["pre_logits_hidden/fully_connected_2/kernel"]
self.assertShapeEquals((5, 5), fc2)
logits_w = variables["logits/kernel"]
self.assertShapeEquals((5, 1), logits_w)