def train_and_evaluate(output_dir):
review_column = feature_column.sparse_column_with_integerized_feature(
const.REVIEW_COLUMN, bucket_size=vocab_size + 1, combiner='sum')
weighted_reviews = feature_column.weighted_sparse_column(
review_column, const.REVIEW_WEIGHT)
estimator = learn.LinearClassifier(
feature_columns=[weighted_reviews],
n_classes=2,
model_dir=output_dir,
config=tf.contrib.learn.RunConfig(save_checkpoints_secs=30))
transformed_metadata = metadata_io.read_metadata(
transformed_metadata_dir)
raw_metadata = metadata_io.read_metadata(raw_metadata_dir)
train_input_fn = input_fn_maker.build_training_input_fn(
transformed_metadata,
transformed_train_file_pattern,
training_batch_size=train_batch_size,
label_keys=[const.LABEL_COLUMN])
eval_input_fn = input_fn_maker.build_training_input_fn(
transformed_metadata,
transformed_test_file_pattern,
training_batch_size=1,
label_keys=[const.LABEL_COLUMN])
serving_input_fn = input_fn_maker.build_default_transforming_serving_input_fn(
raw_metadata=raw_metadata,
transform_savedmodel_dir=output_dir + '/transform_fn',
raw_label_keys=[],
raw_feature_keys=[const.REVIEW_COLUMN])
export_strategy = saved_model_export_utils.make_export_strategy(
serving_input_fn,
exports_to_keep=5,
default_output_alternative_key=None)
return tf.contrib.learn.Experiment(estimator=estimator,
train_steps=train_num_epochs *
num_train_instances /
train_batch_size,
eval_steps=num_test_instances,
train_input_fn=train_input_fn,
eval_input_fn=eval_input_fn,
export_strategies=export_strategy,
min_eval_frequency=500)
def transformed_metadata(self):
"""A DatasetMetadata."""
if self._transformed_metadata is None:
self._transformed_metadata = metadata_io.read_metadata(
os.path.join(self._transform_output_dir,
self.TRANSFORMED_METADATA_DIR))
return self._transformed_metadata
def make_input_function(working_dir,
filebase,
num_epochs=None,
shuffle=True,
batch_size=200):
transformed_metadata = metadata_io.read_metadata(
os.path.join(working_dir, transform_fn_io.TRANSFORMED_METADATA_DIR))
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
def parse_tf_record(example_proto):
parsed_features = tf.parse_single_example(example_proto,
transformed_feature_spec)
return parsed_features
def input_func():
file_pattern = os.path.join(working_dir, filebase + '-*')
file_names = tf.data.TFRecordDataset.list_files(file_pattern)
dataset = file_names.flat_map(
lambda x: tf.data.TFRecordDataset(x)).map(parse_tf_record)
if shuffle:
dataset = dataset.shuffle(buffer_size=batch_size * 10)
dataset = dataset.repeat(num_epochs).batch(batch_size)
iterator = dataset.make_one_shot_iterator()
features = iterator.get_next()
return features, features.pop(LABEL_KEY)
return input_func
def is_classification(transformed_data_dir, target):
"""Whether the scenario is classification (vs regression).
Returns:
The number of classes if the target represents a classification
problem, or None if it does not.
"""
transformed_metadata = metadata_io.read_metadata(
os.path.join(transformed_data_dir,
transform_fn_io.TRANSFORMED_METADATA_DIR))
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
if target not in transformed_feature_spec:
raise ValueError('Cannot find target "%s" in transformed data.' %
target)
feature = transformed_feature_spec[target]
if (not isinstance(feature, tf.FixedLenFeature) or feature.shape != []
or feature.dtype not in TARGET_TYPES):
raise ValueError('target "%s" is of invalid type.' % target)
if feature.dtype in CLASSIFICATION_TARGET_TYPES:
if feature.dtype == tf.bool:
return 2
return get_vocab_size(transformed_data_dir, target)
return None
def testWriteTransformFn(self):
path = os.path.join(self.get_temp_dir(), 'output')
with beam.Pipeline() as pipeline:
# Create an empty directory for the source saved model dir.
saved_model_dir = os.path.join(self.get_temp_dir(), 'source')
file_io.recursive_create_dir(saved_model_dir)
saved_model_dir_pcoll = (
pipeline
| 'CreateSavedModelDir' >> beam.Create([saved_model_dir]))
metadata = beam_metadata_io.BeamDatasetMetadata(
_TEST_METADATA_WITH_FUTURES, {
'a': pipeline | 'CreateA' >> beam.Create([3]),
})
_ = ((saved_model_dir_pcoll, metadata)
| transform_fn_io.WriteTransformFn(path))
transformed_metadata_dir = os.path.join(
path, transform_fn_io.TRANSFORMED_METADATA_DIR)
metadata = metadata_io.read_metadata(transformed_metadata_dir)
self.assertEqual(metadata, _TEST_METADATA)
transform_fn_dir = os.path.join(path, transform_fn_io.TRANSFORM_FN_DIR)
self.assertTrue(file_io.file_exists(transform_fn_dir))
self.assertTrue(file_io.is_directory(transform_fn_dir))
def input_fn(filenames, tf_transform_dir, batch_size=200):
"""Generates features and labels for training or evaluation.
Args:
filenames: [str] list of CSV files to read data from.
tf_transform_dir: directory in which the tf-transform model was written
during the preprocessing step.
batch_size: int First dimension size of the Tensors returned by input_fn
Returns:
A (features, indices) tuple where features is a dictionary of
Tensors, and indices is a single Tensor of label indices.
"""
metadata_dir = os.path.join(tf_transform_dir,
transform_fn_io.TRANSFORMED_METADATA_DIR)
transformed_metadata = metadata_io.read_metadata(metadata_dir)
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
transformed_features = tf.contrib.learn.io.read_batch_features(
filenames,
batch_size,
transformed_feature_spec,
reader=_gzip_reader_fn)
# We pop the label because we do not want to use it as a feature while we're
# training.
return transformed_features, transformed_features.pop(taxi.LABEL_KEY)
def _input_fn(filenames, transform_output, batch_size=200):
"""Generates features and labels for training or evaluation.
Args:
filenames: [str] list of CSV files to read data from.
transform_output: directory in which the tf-transform model was written
during the preprocessing step.
batch_size: int First dimension size of the Tensors returned by input_fn
Returns:
A (features, indices) tuple where features is a dictionary of
Tensors, and indices is a single Tensor of label indices.
"""
metadata_dir = os.path.join(transform_output,
transform_fn_io.TRANSFORMED_METADATA_DIR)
transformed_metadata = metadata_io.read_metadata(metadata_dir)
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
transformed_features = tf.contrib.learn.io.read_batch_features(
filenames,
batch_size,
transformed_feature_spec,
reader=_gzip_reader_fn)
# We pop the label because we do not want to use it as a feature while we're
# training.
return transformed_features, transformed_features.pop(
_transformed_name(_LABEL_KEY))
def _make_training_input_fn(working_dir, filebase, batch_size):
"""Creates an input function reading from transformed data.
Args:
working_dir: Directory to read transformed data and metadata from and to
write exported model to.
filebase: Base filename (relative to `working_dir`) of examples.
batch_size: Batch size.
Returns:
The input function for training or eval.
"""
transformed_metadata = metadata_io.read_metadata(
os.path.join(working_dir, tft.TRANSFORMED_METADATA_DIR))
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
def input_fn():
"""Input function for training and eval."""
transformed_features = tf.contrib.learn.io.read_batch_features(
os.path.join(working_dir, filebase + '*'), batch_size,
transformed_feature_spec, tf.TFRecordReader)
# Extract features and label from the transformed tensors.
transformed_labels = transformed_features.pop(LABEL_KEY)
return transformed_features, transformed_labels
return input_fn
def make_serving_input_fn_for_base64_json(args):
raw_metadata = metadata_io.read_metadata(
os.path.join(args['metadata_path'], 'rawdata_metadata'))
transform_savedmodel_dir = (os.path.join(args['metadata_path'],
'transform_fn'))
return input_fn_maker.build_parsing_transforming_serving_input_receiver_fn(
raw_metadata, transform_savedmodel_dir, exclude_raw_keys=[LABEL_COL])
def make_training_input_fn(transformed_data_dir,
mode,
batch_size,
target_name,
num_epochs=None):
"""Creates an input function reading from transformed data.
Args:
transformed_data_dir: Directory to read transformed data and metadata from.
mode: 'train' or 'eval'.
batch_size: Batch size.
target_name: name of the target column.
num_epochs: number of training data epochs.
Returns:
The input function for training or eval.
"""
transformed_metadata = metadata_io.read_metadata(
os.path.join(transformed_data_dir,
transform_fn_io.TRANSFORMED_METADATA_DIR))
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
def _input_fn():
"""Input function for training and eval."""
epochs = 1 if mode == 'eval' else num_epochs
transformed_features = tf.contrib.learn.io.read_batch_features(
os.path.join(transformed_data_dir, mode + '-*'),
batch_size,
transformed_feature_spec,
tf.TFRecordReader,
num_epochs=epochs)
# Extract features and label from the transformed tensors.
transformed_labels = transformed_features.pop(target_name)
return transformed_features, transformed_labels
return _input_fn
def test_read_features(self):
# TODO(b/123241798): use TEST_TMPDIR
basedir = tempfile.mkdtemp()
schema_no_sparse_features = """
{
"feature": [{
"name": "my_key",
"fixedShape": {
"axis": [{
"size": 2
}]
},
"type": "INT",
"domain": {
"ints": {}
},
"parsingOptions": {
"tfOptions": {
"fixedLenFeature": {}
}
}
}]
}
"""
self._write_schema_to_disk(basedir, schema_no_sparse_features)
_ = metadata_io.read_metadata(basedir)
def run(args):
#config = tf.estimator.RunConfig(save_checkpoints_steps=10)
feature_spec = metadata_io.read_metadata(
posixpath.join(
args.input_dir,
constants.TRANSFORMED_METADATA_DIR)).schema.as_feature_spec()
train_input_fn = get_input_fn("{}*".format(
posixpath.join(args.input_dir,
constants.TRANSFORMED_TRAIN_DATA_FILE_PREFIX)),
feature_spec,
num_epochs=args.num_epochs,
batch_size=args.batch_size)
train_spec = tf.estimator.TrainSpec(input_fn=train_input_fn,
max_steps=args.train_steps)
eval_input_fn = get_input_fn(posixpath.join(
args.input_dir, constants.TRANSFORMED_TRAIN_DATA_FILE_PREFIX),
feature_spec,
num_epochs=1,
batch_size=args.batch_size)
eval_spec = tf.estimator.EvalSpec(
input_fn=eval_input_fn
#exporters=tf.estimator.FinalExporter(
# name='export',
# serving_input_receiver_fn=get_serving_input_fn(args.input_dir)
#)
)
linear_regressor = tf.estimator.LinearRegressor(
feature_columns=_get_feature_columns(), model_dir=args.model_dir)
tf.estimator.train_and_evaluate(linear_regressor, train_spec, eval_spec)
def testWriteTransformFn(self):
path = os.path.join(self.get_temp_dir(), 'output')
with beam.Pipeline() as pipeline:
# Create an empty directory for the source saved model dir.
saved_model_dir = os.path.join(self.get_temp_dir(), 'source')
file_io.recursive_create_dir(saved_model_dir)
saved_model_dir_pcoll = (
pipeline
| 'CreateSavedModelDir' >> beam.Create([saved_model_dir]))
metadata = _TEST_METADATA
deferred_metadata = (
pipeline
| 'CreateEmptyProperties' >> beam.Create([_FUTURES_DICT]))
_ = ((saved_model_dir_pcoll, (metadata, deferred_metadata))
| transform_fn_io.WriteTransformFn(path))
transformed_metadata_dir = os.path.join(path, 'transformed_metadata')
metadata = metadata_io.read_metadata(transformed_metadata_dir)
self.assertEqual(metadata, _TEST_METADATA)
transform_fn_dir = os.path.join(path, 'transform_fn')
self.assertTrue(file_io.file_exists(transform_fn_dir))
self.assertTrue(file_io.is_directory(transform_fn_dir))
def testWriteMetadataIsRetryable(self):
tft_test_case.skip_if_external_environment(
'Retries are currently not available on this environment.')
original_write_metadata = beam_metadata_io.metadata_io.write_metadata
write_metadata_called_list = []
def mock_write_metadata(metadata, path):
"""Mocks metadata_io.write_metadata to fail the first time it is called by this test, thus forcing a retry which should succeed."""
if not write_metadata_called_list:
write_metadata_called_list.append(True)
original_write_metadata(metadata, path)
raise ArithmeticError('Some error')
return original_write_metadata(metadata, path)
# Write metadata to disk using WriteMetadata PTransform.
with mock.patch(
'tensorflow_transform.tf_metadata.metadata_io.write_metadata',
mock_write_metadata):
with self._makeTestPipeline() as pipeline:
path = self.get_temp_dir()
_ = (test_metadata.COMPLETE_METADATA
| beam_metadata_io.WriteMetadata(path, pipeline))
# Load from disk and check that it is as expected.
metadata = metadata_io.read_metadata(path)
self.assertEqual(metadata, test_metadata.COMPLETE_METADATA)
def make_experiment(output_dir):
"""Function that creates an experiment http://goo.gl/HcKHlT.
Args:
output_dir: The directory where the training output should be written.
Returns:
A `tf.contrib.learn.Experiment`.
"""
estimator = tf.contrib.learn.Estimator(
model_fn=model_builder(hparams=args),
model_dir=output_dir)
train_input_fn = make_input_fn(
mode=tf.contrib.learn.ModeKeys.TRAIN,
eval_type=args.eval_type,
data_file_pattern=args.train_data_paths,
randomize_input=args.randomize_input,
batch_size=args.batch_size,
queue_capacity=4 * args.batch_size)
eval_input_fn = make_input_fn(
mode=tf.contrib.learn.ModeKeys.EVAL,
eval_type=args.eval_type,
data_file_pattern=args.eval_data_paths,
batch_size=args.eval_batch_size,
queue_capacity=4 * args.eval_batch_size)
raw_metadata = metadata_io.read_metadata(args.raw_metadata_path)
# Both ratings and candidate features are not needed for serving.
raw_label_keys = [LABEL_RATING_SCORE]
# For serving, we only need query features.
raw_feature_keys = [QUERY_RATED_MOVIE_IDS,
QUERY_RATED_MOVIE_SCORES,
QUERY_RATED_GENRE_IDS,
QUERY_RATED_GENRE_FREQS,
QUERY_RATED_GENRE_AVG_SCORES]
serving_input_fn = (
input_fn_maker.build_parsing_transforming_serving_input_fn(
raw_metadata,
args.transform_savedmodel,
raw_label_keys=raw_label_keys,
raw_feature_keys=raw_feature_keys))
export_strategy = tf.contrib.learn.utils.make_export_strategy(
serving_input_fn,
default_output_alternative_key=DEFAULT_OUTPUT_ALTERNATIVE)
return tf.contrib.learn.Experiment(
estimator=estimator,
train_steps=(args.train_steps or
args.num_epochs * args.train_set_size // args.batch_size),
eval_steps=args.eval_steps,
train_input_fn=train_input_fn,
eval_input_fn=eval_input_fn,
eval_metrics=create_evaluation_metrics(args.eval_type),
export_strategies=[export_strategy],
# Do not remove this is needed until b/36498507 is fixed.
min_eval_frequency=1000)
def make_serving_input_fn_for_base64_json(args):
raw_metadata = metadata_io.read_metadata(
os.path.join(args['metadata_path'], 'rawdata_metadata'))
transform_savedmodel_dir = (
os.path.join(args['metadata_path'], 'transform_fn'))
return input_fn_maker.build_parsing_transforming_serving_input_receiver_fn(
raw_metadata,
transform_savedmodel_dir,
exclude_raw_keys = [LABEL_COLUMN])
def testWriteMetadataNonDeferred(self):
# Write properties as metadata to disk.
with beam.Pipeline() as pipeline:
path = self.get_temp_dir()
_ = (_TEST_METADATA_COMPLETE
| beam_metadata_io.WriteMetadata(path, pipeline))
# Load from disk and check that it is as expected.
metadata = metadata_io.read_metadata(path)
self.assertMetadataEqual(metadata, _TEST_METADATA_COMPLETE)
def parse_tf_example(tf_example):
transformed_metadata = metadata_io.read_metadata(os.path.join(params.Params.TRANSFORM_ARTIFACTS_DIR,"transformed_metadata"))
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
parsed_features = tf.parse_example(serialized=tf_example, features=transformed_feature_spec)
target = parsed_features.pop(metadata.TARGET_FEATURE_NAME)
return parsed_features, target
def _build_estimator(transform_output,
config,
hidden_units=None,
warm_start_from=None):
"""Build an estimator for predicting the tipping behavior of taxi riders.
Args:
transform_output: directory in which the tf-transform model was written
during the preprocessing step.
config: tf.contrib.learn.RunConfig defining the runtime environment for the
estimator (including model_dir).
hidden_units: [int], the layer sizes of the DNN (input layer first)
warm_start_from: Optional directory to warm start from.
Returns:
A dict of the following:
- estimator: The estimator that will be used for training and eval.
- train_spec: Spec for training.
- eval_spec: Spec for eval.
- eval_input_receiver_fn: Input function for eval.
"""
metadata_dir = os.path.join(transform_output,
transform_fn_io.TRANSFORMED_METADATA_DIR)
transformed_metadata = metadata_io.read_metadata(metadata_dir)
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
transformed_feature_spec.pop(_transformed_name(_LABEL_KEY))
real_valued_columns = [
tf.feature_column.numeric_column(key, shape=())
for key in _transformed_names(_DENSE_FLOAT_FEATURE_KEYS)
]
categorical_columns = [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=_VOCAB_SIZE + _OOV_SIZE, default_value=0)
for key in _transformed_names(_VOCAB_FEATURE_KEYS)
]
categorical_columns += [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=_FEATURE_BUCKET_COUNT, default_value=0)
for key in _transformed_names(_BUCKET_FEATURE_KEYS)
]
categorical_columns += [
tf.feature_column.categorical_column_with_identity( # pylint: disable=g-complex-comprehension
key,
num_buckets=num_buckets,
default_value=0) for key, num_buckets in zip(
_transformed_names(_CATEGORICAL_FEATURE_KEYS),
_MAX_CATEGORICAL_FEATURE_VALUES)
]
return tf.estimator.DNNLinearCombinedClassifier(
config=config,
linear_feature_columns=categorical_columns,
dnn_feature_columns=real_valued_columns,
dnn_hidden_units=hidden_units or [100, 70, 50, 25],
warm_start_from=warm_start_from)
def make_experiment(output_dir):
"""Function that creates an experiment http://goo.gl/HcKHlT.
Args:
output_dir: The directory where the training output should be written.
Returns:
A `tf.contrib.learn.Experiment`.
"""
estimator = tf.contrib.learn.Estimator(
model_fn=model_builder(hparams=args), model_dir=output_dir)
train_input_fn = make_input_fn(mode=tf.contrib.learn.ModeKeys.TRAIN,
eval_type=args.eval_type,
data_file_pattern=args.train_data_paths,
randomize_input=args.randomize_input,
batch_size=args.batch_size,
queue_capacity=4 * args.batch_size)
eval_input_fn = make_input_fn(mode=tf.contrib.learn.ModeKeys.EVAL,
eval_type=args.eval_type,
data_file_pattern=args.eval_data_paths,
batch_size=args.eval_batch_size,
queue_capacity=4 * args.eval_batch_size)
raw_metadata = metadata_io.read_metadata(args.raw_metadata_path)
# Both ratings and candidate features are not needed for serving.
raw_label_keys = [LABEL_RATING_SCORE]
# For serving, we only need query features.
raw_feature_keys = [
QUERY_RATED_MOVIE_IDS, QUERY_RATED_MOVIE_SCORES,
QUERY_RATED_GENRE_IDS, QUERY_RATED_GENRE_FREQS,
QUERY_RATED_GENRE_AVG_SCORES
]
serving_input_fn = (
input_fn_maker.build_parsing_transforming_serving_input_fn(
raw_metadata,
args.transform_savedmodel,
raw_label_keys=raw_label_keys,
raw_feature_keys=raw_feature_keys))
export_strategy = tf.contrib.learn.utils.make_export_strategy(
serving_input_fn,
default_output_alternative_key=DEFAULT_OUTPUT_ALTERNATIVE)
return tf.contrib.learn.Experiment(
estimator=estimator,
train_steps=(args.train_steps or args.num_epochs *
args.train_set_size // args.batch_size),
eval_steps=args.eval_steps,
train_input_fn=train_input_fn,
eval_input_fn=eval_input_fn,
eval_metrics=create_evaluation_metrics(args.eval_type),
export_strategies=[export_strategy],
# Do not remove this is needed until b/36498507 is fixed.
min_eval_frequency=1000)
def _build_estimator(transform_output,
config,
hidden_units=None,
warm_start_from=None):
"""Build an estimator for predicting the tipping behavior of taxi riders.
Args:
transform_output: directory in which the tf-transform model was written
during the preprocessing step.
config: tf.contrib.learn.RunConfig defining the runtime environment for the
estimator (including model_dir).
hidden_units: [int], the layer sizes of the DNN (input layer first)
warm_start_from: Optional directory to warm start from.
Returns:
A dict of the following:
- estimator: The estimator that will be used for training and eval.
- train_spec: Spec for training.
- eval_spec: Spec for eval.
- eval_input_receiver_fn: Input function for eval.
"""
metadata_dir = os.path.join(transform_output,
transform_fn_io.TRANSFORMED_METADATA_DIR)
transformed_metadata = metadata_io.read_metadata(metadata_dir)
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
transformed_feature_spec.pop(_transformed_name(_LABEL_KEY))
real_valued_columns = [
tf.feature_column.numeric_column(key, shape=())
for key in _transformed_names(_DENSE_FLOAT_FEATURE_KEYS)
]
categorical_columns = [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=_VOCAB_SIZE + _OOV_SIZE, default_value=0)
for key in _transformed_names(_VOCAB_FEATURE_KEYS)
]
categorical_columns += [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=_FEATURE_BUCKET_COUNT, default_value=0)
for key in _transformed_names(_BUCKET_FEATURE_KEYS)
]
categorical_columns += [
tf.feature_column.categorical_column_with_identity( # pylint: disable=g-complex-comprehension
key,
num_buckets=num_buckets,
default_value=0) for key, num_buckets in zip(
_transformed_names(_CATEGORICAL_FEATURE_KEYS),
_MAX_CATEGORICAL_FEATURE_VALUES)
]
return tf.estimator.DNNLinearCombinedClassifier(
config=config,
linear_feature_columns=categorical_columns,
dnn_feature_columns=real_valued_columns,
dnn_hidden_units=hidden_units or [100, 70, 50, 25],
warm_start_from=warm_start_from)
def testWriteMetadataNonDeferred(self):
# Write metadata to disk using WriteMetadata PTransform.
with beam.Pipeline() as pipeline:
path = self.get_temp_dir()
_ = (test_metadata.COMPLETE_METADATA
| beam_metadata_io.WriteMetadata(path, pipeline))
# Load from disk and check that it is as expected.
metadata = metadata_io.read_metadata(path)
self.assertEqual(metadata, test_metadata.COMPLETE_METADATA)
def test_write_and_read(self):
# TODO(b/123241798): use TEST_TMPDIR
basedir = tempfile.mkdtemp()
original = dataset_metadata.DatasetMetadata(
schema=test_common.get_test_schema())
metadata_io.write_metadata(original, basedir)
reloaded = metadata_io.read_metadata(basedir)
self.assertEqual(original, reloaded)
def testWriteMetadataDeferredProperties(self):
# Write deferred properties as metadata to disk.
with beam.Pipeline() as pipeline:
path = self.get_temp_dir()
deferred_metadata = pipeline | beam.Create([_FUTURES_DICT])
_ = ((_TEST_METADATA_WITH_FUTURES, deferred_metadata)
| beam_metadata_io.WriteMetadata(path, pipeline))
# Load from disk and check that it is as expected.
metadata = metadata_io.read_metadata(path)
self.assertMetadataEqual(metadata, _TEST_METADATA)
def testWriteMetadataNonDeferredEmptyDict(self):
# Write properties as metadata to disk.
with beam.Pipeline() as pipeline:
path = self.get_temp_dir()
property_pcoll = pipeline | beam.Create([{}])
_ = ((_TEST_METADATA, property_pcoll)
| beam_metadata_io.WriteMetadata(path, pipeline))
# Load from disk and check that it is as expected.
metadata = metadata_io.read_metadata(path)
self.assertMetadataEqual(metadata, _TEST_METADATA)
def expand(self, pvalue):
# Read metadata in non-deferred manner. Note that since this reads the
# whole metadata in a non-deferred manner, typically the roundtrip
#
# done = metadata | WriteMetadata(path)
# metadata = p | ReadMetadata(path).must_follow(done)
#
# will fail as the metadata on disk will not be complete when the read is
# done.
return metadata_io.read_metadata(self._path)
def test_write_and_read(self):
basedir = tempfile.mkdtemp()
original = dataset_metadata.DatasetMetadata(
schema=test_common.get_test_schema())
metadata_io.write_metadata(original, basedir, versions=_test_versions)
reloaded = metadata_io.read_metadata(basedir, versions=_test_versions)
generated_feature_spec = reloaded.schema.as_feature_spec()
self.assertEqual(test_common.test_feature_spec, generated_feature_spec)
def expand(self, pvalue):
transform_fn_path = os.path.join(self._path, TRANSFORM_FN_DIR)
saved_model_dir_pcoll = (
pvalue.pipeline
| 'CreateTransformFnPath' >> beam.Create([transform_fn_path]))
metadata = metadata_io.read_metadata(
os.path.join(self._path, TRANSFORMED_METADATA_DIR))
return saved_model_dir_pcoll, metadata
def test_write_and_read(self):
# TODO(b/123241798): use TEST_TMPDIR
basedir = tempfile.mkdtemp()
original = dataset_metadata.DatasetMetadata(
schema=test_common.get_test_schema())
metadata_io.write_metadata(original, basedir)
reloaded = metadata_io.read_metadata(basedir)
generated_feature_spec = reloaded.schema.as_feature_spec()
self.assertEqual(test_common.test_feature_spec, generated_feature_spec)
def test_write_and_read(self):
basedir = tempfile.mkdtemp()
original_schema = schema_io_vtest.TestSchema(
{'test_feature_1': 'bogus 1', 'test_feature_2': 'bogus 2'})
original = dataset_metadata.DatasetMetadata(schema=original_schema)
metadata_io.write_metadata(original, basedir, versions=_test_versions)
reloaded = metadata_io.read_metadata(basedir, versions=_test_versions)
self.assertTrue('test_feature_1' in reloaded.schema.column_schemas)
self.assertTrue('test_feature_2' in reloaded.schema.column_schemas)
self.assertEqual(2, len(reloaded.schema.column_schemas))
def test_read_with_invalid_keys(self):
basedir = tempfile.mkdtemp()
version_basedir = os.path.join(basedir, 'v1-json')
# Write a proto by hand to disk
file_io.recursive_create_dir(version_basedir)
file_io.write_string_to_file(
os.path.join(version_basedir, 'schema.json'),
_SCHEMA_WITH_INVALID_KEYS)
with self.assertRaisesRegexp(
ValueError, 'Keys of dense and sparse features overlapped.*'):
_ = metadata_io.read_metadata(basedir, versions=_test_versions)
def expand(self, pvalue):
transform_fn_path = os.path.join(self._path, 'transform_fn')
saved_model_dir_pcoll = (
pvalue.pipeline
| 'CreateTransformFnPath' >> beam.Create([transform_fn_path]))
metadata = metadata_io.read_metadata(
os.path.join(self._path, 'transformed_metadata'))
deferred_metadata = (
pvalue.pipeline
| 'CreateEmptyDeferredMetadata' >> beam.Create([{}]))
return saved_model_dir_pcoll, (metadata, deferred_metadata)
def train_and_evaluate(transformed_train_filepattern,
transformed_test_filepattern, transformed_metadata_dir,
num_train_instances=NUM_TRAIN_INSTANCES,
num_test_instances=NUM_TEST_INSTANCES):
"""Train the model on training data and evaluate on test data.
Args:
transformed_train_filepattern: File pattern for transformed training data
shards
transformed_test_filepattern: File pattern for transformed test data shards
transformed_metadata_dir: Directory containing transformed data metadata
num_train_instances: Number of instances in train set
num_test_instances: Number of instances in test set
Returns:
The results from the estimator's 'evaluate' method
"""
# Wrap scalars as real valued columns.
real_valued_columns = [feature_column.real_valued_column(key)
for key in NUMERIC_COLUMNS]
# Wrap categorical columns. Note the combiner is irrelevant since the input
# only has one value set per feature per instance.
one_hot_columns = [
feature_column.sparse_column_with_integerized_feature(
key, bucket_size=bucket_size, combiner='sum')
for key, bucket_size in zip(CATEGORICAL_COLUMNS, BUCKET_SIZES)]
estimator = learn.LinearClassifier(real_valued_columns + one_hot_columns)
transformed_metadata = metadata_io.read_metadata(transformed_metadata_dir)
train_input_fn = input_fn_maker.build_training_input_fn(
transformed_metadata,
transformed_train_filepattern,
training_batch_size=TRAIN_BATCH_SIZE,
label_keys=[LABEL_COLUMN])
# Estimate the model using the default optimizer.
estimator.fit(
input_fn=train_input_fn,
max_steps=TRAIN_NUM_EPOCHS * num_train_instances / TRAIN_BATCH_SIZE)
# Evaluate model on test dataset.
eval_input_fn = input_fn_maker.build_training_input_fn(
transformed_metadata,
transformed_test_filepattern,
training_batch_size=1,
label_keys=[LABEL_COLUMN])
return estimator.evaluate(input_fn=eval_input_fn, steps=num_test_instances)
def raw_metadata(self):
"""A DatasetMetadata.
Note: raw_metadata is not guaranteed to exist in the output of tf.transform
and hence using this could fail, if raw_metadata is not present in
TFTransformOutput.
Returns:
A DatasetMetadata
"""
if self._raw_metadata is None:
self._raw_metadata = metadata_io.read_metadata(
os.path.join(self._transform_output_dir, self.RAW_METADATA_DIR))
return self._raw_metadata
def build_estimator(tf_transform_dir, config, hidden_units=None):
"""Build an estimator for predicting the tipping behavior of taxi riders.
Args:
tf_transform_dir: directory in which the tf-transform model was written
during the preprocessing step.
config: tf.contrib.learn.RunConfig defining the runtime environment for the
estimator (including model_dir).
hidden_units: [int], the layer sizes of the DNN (input layer first)
Returns:
Resulting DNNLinearCombinedClassifier.
"""
metadata_dir = os.path.join(tf_transform_dir,
transform_fn_io.TRANSFORMED_METADATA_DIR)
transformed_metadata = metadata_io.read_metadata(metadata_dir)
transformed_feature_spec = transformed_metadata.schema.as_feature_spec()
transformed_feature_spec.pop(taxi.transformed_name(taxi.LABEL_KEY))
real_valued_columns = [
tf.feature_column.numeric_column(key, shape=())
for key in taxi.transformed_names(taxi.DENSE_FLOAT_FEATURE_KEYS)
]
categorical_columns = [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=taxi.VOCAB_SIZE + taxi.OOV_SIZE, default_value=0)
for key in taxi.transformed_names(taxi.VOCAB_FEATURE_KEYS)
]
categorical_columns += [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=taxi.FEATURE_BUCKET_COUNT, default_value=0)
for key in taxi.transformed_names(taxi.BUCKET_FEATURE_KEYS)
]
categorical_columns += [
tf.feature_column.categorical_column_with_identity(
key, num_buckets=num_buckets, default_value=0)
for key, num_buckets in zip(
taxi.transformed_names(taxi.CATEGORICAL_FEATURE_KEYS), #
taxi.MAX_CATEGORICAL_FEATURE_VALUES)
]
return tf.estimator.DNNLinearCombinedClassifier(
config=config,
linear_feature_columns=categorical_columns,
dnn_feature_columns=real_valued_columns,
dnn_hidden_units=hidden_units or [100, 70, 50, 25])
def read_dataset(args, mode):
batch_size = args['train_batch_size']
if mode == tf.estimator.ModeKeys.TRAIN:
input_paths = args['train_data_paths']
else:
input_paths = args['eval_data_paths']
transformed_metadata = metadata_io.read_metadata(
os.path.join(args['metadata_path'], 'transformed_metadata'))
return input_fn_maker.build_training_input_fn(
metadata = transformed_metadata,
file_pattern = (
input_paths[0] if len(input_paths) == 1 else input_paths),
training_batch_size = batch_size,
label_keys = [LABEL_COLUMN],
reader = gzip_reader_fn,
key_feature_name = KEY_FEATURE_COLUMN,
randomize_input = (mode != tf.estimator.ModeKeys.EVAL),
num_epochs = (1 if mode == tf.estimator.ModeKeys.EVAL else None))
def get_experiment(output_dir):
"""Function that creates an experiment http://goo.gl/HcKHlT.
Args:
output_dir: The directory where the training output should be written.
Returns:
A `tf.contrib.learn.Experiment`.
"""
columns = feature_columns(args.model_type, vocab_sizes, use_crosses)
runconfig = tf.contrib.learn.RunConfig()
cluster = runconfig.cluster_spec
num_table_shards = max(1, runconfig.num_ps_replicas * 3)
num_partitions = max(1, 1 + cluster.num_tasks('worker') if cluster and
'worker' in cluster.jobs else 0)
model_dir = os.path.join(output_dir, MODEL_DIR)
if args.model_type == LINEAR:
estimator = tf.contrib.learn.LinearRegressor(
model_dir=model_dir,
feature_columns=columns,
optimizer=tf.contrib.linear_optimizer.SDCAOptimizer(
example_id_column=KEY_FEATURE_COLUMN,
symmetric_l2_regularization=args.l2_regularization,
num_loss_partitions=num_partitions, # workers
num_table_shards=num_table_shards)) # ps
elif args.model_type == DEEP:
estimator = tf.contrib.learn.DNNRegressor(
hidden_units=args.hidden_units,
feature_columns=columns,
model_dir=model_dir)
transformed_metadata = metadata_io.read_metadata(
args.transformed_metadata_path)
raw_metadata = metadata_io.read_metadata(args.raw_metadata_path)
serving_input_fn = (
input_fn_maker.build_parsing_transforming_serving_input_fn(
raw_metadata,
args.transform_savedmodel,
raw_label_keys=[TARGET_FEATURE_COLUMN]))
export_strategy = tf.contrib.learn.utils.make_export_strategy(
serving_input_fn, exports_to_keep=5,
default_output_alternative_key=None)
train_input_fn = get_transformed_reader_input_fn(
transformed_metadata, args.train_data_paths, args.batch_size,
tf.contrib.learn.ModeKeys.TRAIN)
eval_input_fn = get_transformed_reader_input_fn(
transformed_metadata, args.eval_data_paths, args.batch_size,
tf.contrib.learn.ModeKeys.EVAL)
return tf.contrib.learn.Experiment(
estimator=estimator,
train_steps=(args.train_steps or
args.num_epochs * args.train_set_size // args.batch_size),
eval_steps=args.eval_steps,
train_input_fn=train_input_fn,
eval_input_fn=eval_input_fn,
export_strategies=export_strategy,
min_eval_frequency=500)