def test_stats_pipeline_with_sample_count(self):
# input with three examples.
examples = [{
'c': np.linspace(1, 3000, 3000, dtype=np.int32)
}, {
'c': np.linspace(1, 3000, 3000, dtype=np.int32)
}, {
'c': np.linspace(1, 3000, 3000, dtype=np.int32)
}]
with beam.Pipeline() as p:
options = stats_options.StatsOptions(
sample_count=1,
num_top_values=2,
num_rank_histogram_buckets=2,
num_values_histogram_buckets=2,
num_histogram_buckets=2,
num_quantiles_histogram_buckets=2,
epsilon=0.001)
result = (p | beam.Create(examples)
| stats_api.GenerateStatistics(options))
util.assert_that(
result,
test_util.make_dataset_feature_stats_list_proto_equal_fn(
self, self._sampling_test_expected_result))
def test_stats_options_with_slice_fns_to_json(self):
slice_functions = [slicing_util.get_feature_value_slicer({'b': None})]
options = stats_options.StatsOptions(
experimental_slice_functions=slice_functions)
with self.assertRaisesRegex(ValueError,
'StatsOptions cannot be converted'):
options.to_json()
def test_stats_options_from_json(self):
options_json = """{
"_generators": null,
"_feature_whitelist": null,
"_schema": null,
"weight_feature": null,
"label_feature": null,
"_slice_functions": null,
"_sample_rate": null,
"num_top_values": 20,
"frequency_threshold": 1,
"weighted_frequency_threshold": 1.0,
"num_rank_histogram_buckets": 1000,
"_num_values_histogram_buckets": 10,
"_num_histogram_buckets": 10,
"_num_quantiles_histogram_buckets": 10,
"epsilon": 0.01,
"infer_type_from_schema": false,
"_desired_batch_size": null,
"enable_semantic_domain_stats": false,
"_semantic_domain_stats_sample_rate": null
}"""
actual_options = stats_options.StatsOptions.from_json(options_json)
expected_options_dict = stats_options.StatsOptions().__dict__
self.assertEqual(expected_options_dict, actual_options.__dict__)
def test_validate_instance_stats_options_without_schema(self):
instance = {'feature': np.array(['A'])}
# This instance of StatsOptions has no schema.
options = stats_options.StatsOptions()
with self.assertRaisesRegexp(ValueError,
'options must include a schema.'):
_ = validation_api.validate_instance(instance, options)
def test_validate_instance_invalid_environment(self):
instance = {'feature': np.array(['A'])}
schema = text_format.Parse(
"""
default_environment: "TRAINING"
default_environment: "SERVING"
feature {
name: "label"
not_in_environment: "SERVING"
value_count { min: 1 max: 1 }
presence { min_count: 1 }
type: BYTES
}
feature {
name: "feature"
value_count { min: 1 max: 1 }
presence { min_count: 1 }
type: BYTES
}
""", schema_pb2.Schema())
options = stats_options.StatsOptions(schema=schema)
with self.assertRaisesRegexp(ValueError,
'Environment.*not found in the schema.*'):
_ = validation_api.validate_instance(instance,
options,
environment='INVALID')
def setUp(self):
self._default_stats_options = stats_options.StatsOptions(
num_top_values=2,
num_rank_histogram_buckets=2,
num_values_histogram_buckets=2,
num_histogram_buckets=2,
num_quantiles_histogram_buckets=2)
def test_stats_options_from_json(self):
options_json = """{
"_generators": null,
"_feature_allowlist": null,
"_schema": null,
"_vocab_paths": null,
"weight_feature": null,
"label_feature": null,
"_slice_functions": null,
"_sample_rate": null,
"num_top_values": 20,
"frequency_threshold": 1,
"weighted_frequency_threshold": 1.0,
"num_rank_histogram_buckets": 1000,
"_num_values_histogram_buckets": 10,
"_num_histogram_buckets": 10,
"_num_quantiles_histogram_buckets": 10,
"epsilon": 0.01,
"infer_type_from_schema": false,
"_desired_batch_size": null,
"enable_semantic_domain_stats": false,
"_semantic_domain_stats_sample_rate": null,
"_per_feature_weight_override": null,
"_add_default_generators": true,
"_use_sketch_based_topk_uniques": false,
"_slice_sqls": null,
"_experimental_result_partitions": 1,
"_experimental_num_feature_partitions": 1
}"""
actual_options = stats_options.StatsOptions.from_json(options_json)
expected_options_dict = stats_options.StatsOptions().__dict__
self.assertEqual(expected_options_dict, actual_options.__dict__)
def test_stats_pipeline_with_sample_count(self):
record_batches = [
pa.RecordBatch.from_arrays(
[pa.array([np.linspace(1, 3000, 3000, dtype=np.int32)])],
['c']),
pa.RecordBatch.from_arrays(
[pa.array([np.linspace(1, 3000, 3000, dtype=np.int32)])],
['c']),
pa.RecordBatch.from_arrays(
[pa.array([np.linspace(1, 3000, 3000, dtype=np.int32)])],
['c']),
]
with beam.Pipeline() as p:
options = stats_options.StatsOptions(
sample_count=3000,
num_top_values=2,
num_rank_histogram_buckets=2,
num_values_histogram_buckets=2,
num_histogram_buckets=2,
num_quantiles_histogram_buckets=2,
epsilon=0.001,
desired_batch_size=3000)
result = (p | beam.Create(record_batches)
| stats_api.GenerateStatistics(options))
util.assert_that(
result,
test_util.make_dataset_feature_stats_list_proto_equal_fn(
self, self._sampling_test_expected_result))
def test_invalid_sample_rate_negative(self):
examples = [{}]
with self.assertRaises(ValueError):
with beam.Pipeline() as p:
options = stats_options.StatsOptions(sample_rate=-1)
_ = (p | beam.Create(examples)
| stats_api.GenerateStatistics(options))
def generate_statistics_in_memory(examples,
options=stats_options.StatsOptions()):
"""Generates statistics for an in-memory list of examples.
Args:
examples: A list of input examples.
options: Options for generating data statistics.
Returns:
A DatasetFeatureStatisticsList proto.
"""
stats_generators = _get_generators(options, in_memory=True)
batch = batch_util.merge_single_batch(examples)
# If whitelist features are provided, keep only those features.
if options.feature_whitelist:
batch = {
feature_name: batch[feature_name]
for feature_name in options.feature_whitelist
}
outputs = [
generator.extract_output(
generator.add_input(generator.create_accumulator(), batch))
# The type checker raises a false positive here because the type hint for
# the return value of _get_generators (which created the list of
# stats_generators) is StatsGenerator, but add_input, create_accumulator,
# and extract_output can be called only on CombinerStatsGenerators.
for generator in stats_generators # pytype: disable=attribute-error
]
return _make_dataset_feature_statistics_list_proto(
[_merge_dataset_feature_stats_protos(outputs)])
def test_invalid_feature_whitelist(self):
examples = [{'a': np.array([1.0, 2.0])}]
with self.assertRaises(TypeError):
with beam.Pipeline() as p:
options = stats_options.StatsOptions(feature_whitelist={})
_ = (p | beam.Create(examples)
| stats_api.GenerateStatistics(options))
def test_identify_anomalous_examples(self, examples, schema_text,
expected_result):
schema = text_format.Parse(schema_text, schema_pb2.Schema())
options = stats_options.StatsOptions(schema=schema)
with beam.Pipeline() as p:
result = (p | beam.Create(examples)
| validation_api.IdentifyAnomalousExamples(options))
util.assert_that(result, util.equal_to(expected_result))
def test_identify_anomalous_examples_options_without_schema(self):
examples = [{'annotated_enum': np.array(['D'])}]
options = stats_options.StatsOptions()
with self.assertRaisesRegexp(ValueError,
'options must include a schema'):
with beam.Pipeline() as p:
_ = (p | beam.Create(examples)
| validation_api.IdentifyAnomalousExamples(options))
def test_invalid_both_sample_count_and_sample_rate(self):
examples = [{}]
with self.assertRaises(ValueError):
with beam.Pipeline() as p:
options = stats_options.StatsOptions(sample_count=100,
sample_rate=0.5)
_ = (p | beam.Create(examples)
| stats_api.GenerateStatistics(options))
def test_validate_instance_global_only_anomaly_type(self):
instance = {'annotated_enum': np.array(['D'])}
# This schema has a presence.min_count > 1, which will generate an anomaly
# of type FEATURE_TYPE_LOW_NUMBER_PRESENT when any single example is
# validated using this schema. This test checks that this anomaly type
# (which is not meaningful in per-example validation) is not included in the
# Anomalies proto that validate_instance returns.
schema = text_format.Parse(
"""
string_domain {
name: "MyAloneEnum"
value: "A"
value: "B"
value: "C"
}
feature {
name: "annotated_enum"
value_count {
min:1
max:1
}
presence {
min_count: 5
}
type: BYTES
domain: "MyAloneEnum"
}
feature {
name: "ignore_this"
lifecycle_stage: DEPRECATED
value_count {
min:1
}
presence {
min_count: 1
}
type: BYTES
}
""", schema_pb2.Schema())
expected_anomalies = {
'annotated_enum':
text_format.Parse(
"""
description: "Examples contain values missing from the schema: D "
"(~100%). "
severity: ERROR
short_description: "Unexpected string values"
reason {
type: ENUM_TYPE_UNEXPECTED_STRING_VALUES
short_description: "Unexpected string values"
description: "Examples contain values missing from the schema: D "
"(~100%). "
}
""", anomalies_pb2.AnomalyInfo())
}
options = stats_options.StatsOptions(schema=schema)
anomalies = validation_api.validate_instance(instance, options)
self._assert_equal_anomalies(anomalies, expected_anomalies)
def generate_statistics_from_tfrecord(
data_location,
output_path=None,
stats_options=options.StatsOptions(),
pipeline_options=None,
):
"""Compute data statistics from TFRecord files containing TFExamples.
Runs a Beam pipeline to compute the data statistics and return the result
data statistics proto.
This is a convenience method for users with data in TFRecord format.
Users with data in unsupported file/data formats, or users who wish
to create their own Beam pipelines need to use the 'GenerateStatistics'
PTransform API directly instead.
Args:
data_location: The location of the input data files.
output_path: The file path to output data statistics result to. If None, we
use a temporary directory. It will be a TFRecord file containing a single
data statistics proto, and can be read with the 'load_statistics' API.
If you run this function on Google Cloud, you must specify an
output_path. Specifying None may cause an error.
stats_options: `tfdv.StatsOptions` for generating data statistics.
pipeline_options: Optional beam pipeline options. This allows users to
specify various beam pipeline execution parameters like pipeline runner
(DirectRunner or DataflowRunner), cloud dataflow service project id, etc.
See https://cloud.google.com/dataflow/pipelines/specifying-exec-params for
more details.
Returns:
A DatasetFeatureStatisticsList proto.
"""
if output_path is None:
output_path = os.path.join(tempfile.mkdtemp(), 'data_stats.tfrecord')
output_dir_path = os.path.dirname(output_path)
if not tf.gfile.Exists(output_dir_path):
tf.gfile.MakeDirs(output_dir_path)
# PyLint doesn't understand Beam PTransforms.
# pylint: disable=no-value-for-parameter
with beam.Pipeline(options=pipeline_options) as p:
# Auto detect tfrecord file compression format based on input data
# path suffix.
_ = (
p
|
'ReadData' >> beam.io.ReadFromTFRecord(file_pattern=data_location)
| 'DecodeData' >> tf_example_decoder.DecodeTFExample()
|
'GenerateStatistics' >> stats_api.GenerateStatistics(stats_options)
# TODO(b/112014711) Implement a custom sink to write the stats proto.
| 'WriteStatsOutput' >> beam.io.WriteToTFRecord(
output_path,
shard_name_template='',
coder=beam.coders.ProtoCoder(
statistics_pb2.DatasetFeatureStatisticsList)))
return load_statistics(output_path)
def test_validate_examples_in_tfrecord_no_schema(self):
temp_dir_path = self.create_tempdir().full_path
input_data_path = os.path.join(temp_dir_path, 'input_data.tfrecord')
# By default, StatsOptions does not include a schema.
options = stats_options.StatsOptions()
with self.assertRaisesRegexp(
ValueError, 'The specified stats_options must include a schema.'):
validation_lib.validate_examples_in_tfrecord(
data_location=input_data_path, stats_options=options)
def generate_statistics_from_tfrecord(
data_location: Text,
output_path: Optional[bytes] = None,
stats_options: options.StatsOptions = options.StatsOptions(),
pipeline_options: Optional[PipelineOptions] = None,
) -> statistics_pb2.DatasetFeatureStatisticsList:
"""Compute data statistics from TFRecord files containing TFExamples.
Runs a Beam pipeline to compute the data statistics and return the result
data statistics proto.
This is a convenience method for users with data in TFRecord format.
Users with data in unsupported file/data formats, or users who wish
to create their own Beam pipelines need to use the 'GenerateStatistics'
PTransform API directly instead.
Args:
data_location: The location of the input data files.
output_path: The file path to output data statistics result to. If None, we
use a temporary directory. It will be a TFRecord file containing a single
data statistics proto, and can be read with the 'load_statistics' API.
If you run this function on Google Cloud, you must specify an
output_path. Specifying None may cause an error.
stats_options: `tfdv.StatsOptions` for generating data statistics.
pipeline_options: Optional beam pipeline options. This allows users to
specify various beam pipeline execution parameters like pipeline runner
(DirectRunner or DataflowRunner), cloud dataflow service project id, etc.
See https://cloud.google.com/dataflow/pipelines/specifying-exec-params for
more details.
Returns:
A DatasetFeatureStatisticsList proto.
"""
if output_path is None:
output_path = os.path.join(tempfile.mkdtemp(), 'data_stats.tfrecord')
output_dir_path = os.path.dirname(output_path)
if not tf.io.gfile.exists(output_dir_path):
tf.io.gfile.makedirs(output_dir_path)
batch_size = stats_options.desired_batch_size
# PyLint doesn't understand Beam PTransforms.
# pylint: disable=no-value-for-parameter
with beam.Pipeline(options=pipeline_options) as p:
# Auto detect tfrecord file compression format based on input data
# path suffix.
_ = (
p
| 'ReadData' >> (tf_example_record.TFExampleRecord(
file_pattern=data_location,
schema=None,
telemetry_descriptors=['tfdv', 'generate_statistics_from_tfrecord'])
.BeamSource(batch_size))
| 'GenerateStatistics' >> stats_api.GenerateStatistics(stats_options)
| 'WriteStatsOutput' >>
(stats_api.WriteStatisticsToTFRecord(output_path)))
return stats_util.load_statistics(output_path)
def test_identify_anomalous_examples_invalid_max_examples_type(self):
examples = [{'annotated_enum': np.array(['D'])}]
options = stats_options.StatsOptions(schema=schema_pb2.Schema())
max_examples_per_anomaly = 1.5
with self.assertRaisesRegexp(
TypeError, 'max_examples_per_anomaly must be an integer.'):
with beam.Pipeline() as p:
_ = (p | beam.Create(examples)
| validation_api.IdentifyAnomalousExamples(
options, max_examples_per_anomaly))
def test_stats_options_with_generators_to_json(self):
generators = [
lift_stats_generator.LiftStatsGenerator(
schema=None,
y_path=types.FeaturePath(['label']),
x_paths=[types.FeaturePath(['feature'])])
]
options = stats_options.StatsOptions(generators=generators)
with self.assertRaisesRegex(ValueError,
'StatsOptions cannot be converted'):
options.to_json()
def test_example_weight_map(self):
options = stats_options.StatsOptions()
self.assertIsNone(options.example_weight_map.get(types.FeaturePath(['f'])))
self.assertEqual(frozenset([]),
options.example_weight_map.all_weight_features())
options = stats_options.StatsOptions(weight_feature='w')
self.assertEqual('w',
options.example_weight_map.get(types.FeaturePath(['f'])))
self.assertEqual(
frozenset(['w']),
options.example_weight_map.all_weight_features())
options = stats_options.StatsOptions(
per_feature_weight_override={types.FeaturePath(['x']): 'w'})
self.assertIsNone(options.example_weight_map.get(types.FeaturePath(['f'])))
self.assertEqual('w',
options.example_weight_map.get(types.FeaturePath(['x'])))
self.assertEqual(frozenset(['w']),
options.example_weight_map.all_weight_features())
def test_validate_instance(self):
instance = {'annotated_enum': np.array(['D'])}
schema = text_format.Parse(
"""
string_domain {
name: "MyAloneEnum"
value: "A"
value: "B"
value: "C"
}
feature {
name: "annotated_enum"
value_count {
min:1
max:1
}
presence {
min_count: 1
}
type: BYTES
domain: "MyAloneEnum"
}
feature {
name: "ignore_this"
lifecycle_stage: DEPRECATED
value_count {
min:1
}
presence {
min_count: 1
}
type: BYTES
}
""", schema_pb2.Schema())
expected_anomalies = {
'annotated_enum':
text_format.Parse(
"""
description: "Examples contain values missing from the schema: D "
"(~100%). "
severity: ERROR
short_description: "Unexpected string values"
reason {
type: ENUM_TYPE_UNEXPECTED_STRING_VALUES
short_description: "Unexpected string values"
description: "Examples contain values missing from the schema: D "
"(~100%). "
}
""", anomalies_pb2.AnomalyInfo())
}
options = stats_options.StatsOptions(schema=schema)
anomalies = validation_api.validate_instance(instance, options)
self._assert_equal_anomalies(anomalies, expected_anomalies)
def __init__(self, options=stats_options.StatsOptions()):
"""Initializes the transform.
Args:
options: Options for generating data statistics.
Raises:
TypeError: If any of the input options is not of the expected type.
ValueError: If any of the input options is invalid.
"""
self._check_options(options)
self._options = options
def __init__(self, options=stats_options.StatsOptions()):
"""Initializes the transform.
Args:
options: `tfdv.StatsOptions` for generating data statistics.
Raises:
TypeError: If options is not of the expected type.
"""
if not isinstance(options, stats_options.StatsOptions):
raise TypeError(
'options is of type %s, should be a StatsOptions.' %
type(options).__name__)
self._options = options
def generate_statistics_from_dataframe(
dataframe: DataFrame,
stats_options: options.StatsOptions = options.StatsOptions(),
n_jobs: int = 1) -> statistics_pb2.DatasetFeatureStatisticsList:
"""Compute data statistics for the input pandas DataFrame.
This is a utility method for users with in-memory data represented
as a pandas DataFrame.
Args:
dataframe: Input pandas DataFrame.
stats_options: `tfdv.StatsOptions` for generating data statistics.
n_jobs: Number of processes to run (defaults to 1). If -1 is provided,
uses the same number of processes as the number of CPU cores.
Returns:
A DatasetFeatureStatisticsList proto.
"""
if not isinstance(dataframe, DataFrame):
raise TypeError('dataframe argument is of type {}. Must be a '
'pandas DataFrame.'.format(type(dataframe).__name__))
stats_generators = cast(
List[stats_generator.CombinerStatsGenerator],
stats_impl.get_generators(stats_options, in_memory=True))
if n_jobs < -1 or n_jobs == 0:
raise ValueError('Invalid n_jobs parameter {}. Should be either '
' -1 or >= 1.'.format(n_jobs))
if n_jobs == -1:
n_jobs = multiprocessing.cpu_count()
n_jobs = max(min(n_jobs, multiprocessing.cpu_count()), 1)
if n_jobs == 1:
merged_partial_stats = _generate_partial_statistics_from_df(
dataframe, stats_options, stats_generators)
else:
# TODO(pachristopher): Investigate why we don't observe linear speedup after
# a certain number of processes.
splits = np.array_split(dataframe, n_jobs)
partial_stats = Parallel(n_jobs=n_jobs)(
delayed(_generate_partial_statistics_from_df)(
splits[i], stats_options, stats_generators)
for i in range(n_jobs))
merged_partial_stats = [
gen.merge_accumulators(stats)
for gen, stats in zip(stats_generators, zip(*partial_stats))
]
return stats_impl.extract_statistics_output(merged_partial_stats,
stats_generators)
def Do(self, input_dict: Dict[Text, List[types.Artifact]],
output_dict: Dict[Text, List[types.Artifact]],
exec_properties: Dict[Text, Any]) -> None:
"""Computes stats for each split of input using tensorflow_data_validation.
Args:
input_dict: Input dict from input key to a list of Artifacts.
- input_data: A list of type `standard_artifacts.Examples`. This should
contain both 'train' and 'eval' split.
output_dict: Output dict from output key to a list of Artifacts.
- output: A list of type `standard_artifacts.ExampleStatistics`. This
should contain both the 'train' and 'eval' splits.
exec_properties: A dict of execution properties. Not used yet.
Returns:
None
"""
self._log_startup(input_dict, output_dict, exec_properties)
split_uris = []
for artifact in input_dict['input_data']:
for split in artifact_utils.decode_split_names(
artifact.split_names):
uri = os.path.join(artifact.uri, split)
split_uris.append((split, uri))
with self._make_beam_pipeline() as p:
# TODO(b/126263006): Support more stats_options through config.
stats_options = options.StatsOptions()
for split, uri in split_uris:
absl.logging.info(
'Generating statistics for split {}'.format(split))
input_uri = io_utils.all_files_pattern(uri)
output_uri = artifact_utils.get_split_uri(
output_dict['output'], split)
output_path = os.path.join(output_uri, _DEFAULT_FILE_NAME)
_ = (p
| 'ReadData.' + split >>
beam.io.ReadFromTFRecord(file_pattern=input_uri)
| 'DecodeData.' + split >>
tf_example_decoder.DecodeTFExample()
| 'GenerateStatistics.' + split >>
stats_api.GenerateStatistics(stats_options)
| 'WriteStatsOutput.' + split >> beam.io.WriteToTFRecord(
output_path,
shard_name_template='',
coder=beam.coders.ProtoCoder(
statistics_pb2.DatasetFeatureStatisticsList)))
absl.logging.info(
'Statistics for split {} written to {}.'.format(
split, output_uri))
def test_generate_statistics_in_memory_invalid_custom_generator(self):
# Dummy PTransform that does nothing.
class CustomPTransform(beam.PTransform):
def expand(self, pcoll):
pass
examples = [{'a': np.array([1.0])}]
custom_generator = stats_generator.TransformStatsGenerator(
name='CustomStatsGenerator', ptransform=CustomPTransform())
options = stats_options.StatsOptions(generators=[custom_generator])
with self.assertRaisesRegexp(
TypeError, 'Statistics generator.* found object of type '
'TransformStatsGenerator.'):
stats_impl.generate_statistics_in_memory(examples, options)
def test_empty_input(self):
examples = []
expected_result = text_format.Parse(
"""
datasets {
num_examples: 0
}
""", statistics_pb2.DatasetFeatureStatisticsList())
with beam.Pipeline() as p:
result = p | beam.Create(examples) | stats_api.GenerateStatistics(
stats_options.StatsOptions())
util.assert_that(
result,
test_util.make_dataset_feature_stats_list_proto_equal_fn(
self, expected_result))
def generate_statistics_in_memory(examples,
options=stats_options.StatsOptions()):
"""Generates statistics for an in-memory list of examples.
Args:
examples: A list of input examples.
options: Options for generating data statistics.
Returns:
A DatasetFeatureStatisticsList proto.
"""
stats_generators = get_generators(options, in_memory=True)
partial_stats = generate_partial_statistics_in_memory(
examples, options, stats_generators)
return extract_statistics_output(partial_stats, stats_generators)
def test_stats_options_invalid_slicing_sql_query(self):
schema = schema_pb2.Schema(feature=[
schema_pb2.Feature(name='feat1', type=schema_pb2.BYTES),
schema_pb2.Feature(name='feat3', type=schema_pb2.INT)
], )
experimental_slice_sqls = [
"""
SELECT
STRUCT(feat1, feat2)
FROM
example.feat1, example.feat2
"""
]
with self.assertRaisesRegex(ValueError, 'One of the slice SQL query'):
stats_options.StatsOptions(
experimental_slice_sqls=experimental_slice_sqls, schema=schema)
