Adds boosted_trees to the official models (#4074)

* Add boosted_trees to the official models

* Comments addressed from review, and a test added; using absl.flags instead of argparser.

* Used help_wrap. Also added instructions for inference.

official/README.md

@@ -12,6 +12,8 @@ If you are on a version of TensorFlow earlier than 1.4, please [update your inst
 
 Below is a list of the models available.
 
+[boosted_trees](boosted_trees): A Gradient Boosted Trees model to classify higgs boson process from HIGGS Data Set.
+
 [mnist](mnist): A basic model to classify digits from the MNIST dataset.
 
 [resnet](resnet): A deep residual network that can be used to classify both CIFAR-10 and ImageNet's dataset of 1000 classes.

official/boosted_trees/README.md

+# Classifying Higgs boson processes in the HIGGS Data Set
+## Overview
+The [HIGGS Data Set](https://archive.ics.uci.edu/ml/datasets/HIGGS) contains 11 million samples with 28 features, and is for the classification problem to distinguish between a signal process which produces Higgs bosons and a background process which does not.
+
+We use Gradient Boosted Trees algorithm to distinguish the two classes.
+
+---
+
+The code sample uses the high level `tf.estimator.Estimator` and `tf.data.Dataset`.  These APIs are great for fast iteration and quickly adapting models to your own datasets without major code overhauls.  It allows you to move from single-worker training to distributed training, and makes it easy to export model binaries for prediction.  Here, for further simplicity and faster execution, we use a utility function `tf.contrib.estimator.boosted_trees_classifier_train_in_memory`.  This utility function is especially effective when the input is provided as in-memory data sets like numpy arrays.
+
+An input function for the `Estimator` typically uses `tf.data.Dataset` API, which can handle various data control like streaming, batching, transform and shuffling. However `boosted_trees_classifier_train_in_memory()` utility function requires that the entire data is provided as a single batch (i.e. without using `batch()` API). Thus in this practice, simply `Dataset.from_tensors()` is used to convert numpy arrays into structured tensors, and `Dataset.zip()` is used to put features and label together.
+For further references of `Dataset`, [Read more here](https://www.tensorflow.org/programmers_guide/datasets).
+
+## Running the code
+First make sure you've [added the models folder to your Python path](/official/#running-the-models); otherwise you may encounter an error like `ImportError: No module named official.boosted_trees`.
+
+### Setup
+The [HIGGS Data Set](https://archive.ics.uci.edu/ml/datasets/HIGGS) that this sample uses for training is hosted by the [UC Irvine Machine Learning Repository](https://archive.ics.uci.edu/ml/datasets/). We have provided a script that downloads and cleans the necessary files.
+
+```
+python data_download.py
+```
+
+This will download a file and store the processed file under the directory designated by `--data_dir` (defaults to `/tmp/higgs_data/`). To change the target directory, set the `--data_dir` flag. The directory could be network storages that Tensorflow supports (like Google Cloud Storage, `gs://<bucket>/<path>/`).
+The file downloaded to the local temporary folder is about 2.8 GB, and the processed file is about 0.8 GB, so there should be enough storage to handle them.
+
+
+### Training
+
+This example uses about 3 GB of RAM during training.
+You can run the code locally as follows:
+
+```
+python train_higgs.py
+```
+
+The model is by default saved to `/tmp/higgs_model`, which can be changed using the `--model_dir` flag.
+Note that the model_dir is cleaned up before every time training starts.
+
+Model parameters can be adjusted by flags, like `--n_trees`, `--max_depth`, `--learning_rate` and so on.  Check out the code for details.
+
+The final accuacy will be around 74% and loss will be around 0.516 over the eval set, when trained with the default parameters.
+
+By default, the first 1 million examples among 11 millions are used for training, and the last 1 million examples are used for evaluation.
+The training/evaluation data can be selected as index ranges by flags `--train_start`, `--train_count`, `--eval_start`, `--eval_count`, etc.
+
+### TensorBoard
+
+Run TensorBoard to inspect the details about the graph and training progression.
+
+```
+tensorboard --logdir=/tmp/higgs_model  # set logdir as --model_dir set during training.
+```
+
+## Inference with SavedModel
+You can export the model into Tensorflow [SavedModel](https://www.tensorflow.org/programmers_guide/saved_model) format by using the argument `--export_dir`:
+
+```
+python train_higgs.py --export_dir /tmp/higgs_boosted_trees_saved_model
+```
+
+After the model finishes training, use [`saved_model_cli`](https://www.tensorflow.org/programmers_guide/saved_model#cli_to_inspect_and_execute_savedmodel) to inspect and execute the SavedModel.
+
+Try the following commands to inspect the SavedModel:
+
+**Replace `${TIMESTAMP}` with the folder produced (e.g. 1524249124)**
+```
+# List possible tag_sets. Only one metagraph is saved, so there will be one option.
+saved_model_cli show --dir /tmp/higgs_boosted_trees_saved_model/${TIMESTAMP}/
+
+# Show SignatureDefs for tag_set=serve. SignatureDefs define the outputs to show.
+saved_model_cli show --dir /tmp/higgs_boosted_trees_saved_model/${TIMESTAMP}/ \
+    --tag_set serve --all
+```
+
+### Inference
+Let's use the model to predict the income group of two examples:
+
+```
+saved_model_cli run --dir /tmp/boosted_trees_higgs_saved_model/${TIMESTAMP}/ \
+    --tag_set serve --signature_def="predict" \
+    --input_examples='examples=[{"feature_01":[0.8692932],"feature_02":[-0.6350818],"feature_03":[0.2256903],"feature_04":[0.3274701],"feature_05":[-0.6899932],"feature_06":[0.7542022],"feature_07":[-0.2485731],"feature_08":[-1.0920639],"feature_09":[0.0],"feature_10":[1.3749921],"feature_11":[-0.6536742],"feature_12":[0.9303491],"feature_13":[1.1074361],"feature_14":[1.1389043],"feature_15":[-1.5781983],"feature_16":[-1.0469854],"feature_17":[0.0],"feature_18":[0.6579295],"feature_19":[-0.0104546],"feature_20":[-0.0457672],"feature_21":[3.1019614],"feature_22":[1.3537600],"feature_23":[0.9795631],"feature_24":[0.9780762],"feature_25":[0.9200048],"feature_26":[0.7216575],"feature_27":[0.9887509],"feature_28":[0.8766783]}, {"feature_01":[1.5958393],"feature_02":[-0.6078107],"feature_03":[0.0070749],"feature_04":[1.8184496],"feature_05":[-0.1119060],"feature_06":[0.8475499],"feature_07":[-0.5664370],"feature_08":[1.5812393],"feature_09":[2.1730762],"feature_10":[0.7554210],"feature_11":[0.6431096],"feature_12":[1.4263668],"feature_13":[0.0],"feature_14":[0.9216608],"feature_15":[-1.1904324],"feature_16":[-1.6155890],"feature_17":[0.0],"feature_18":[0.6511141],"feature_19":[-0.6542270],"feature_20":[-1.2743449],"feature_21":[3.1019614],"feature_22":[0.8237606],"feature_23":[0.9381914],"feature_24":[0.9717582],"feature_25":[0.7891763],"feature_26":[0.4305533],"feature_27":[0.9613569],"feature_28":[0.9578179]}]'
+```
+
+This will print out the predicted classes and class probabilities.
+
+## Additional Links
+
+If you are interested in distributed training, take a look at [Distributed TensorFlow](https://www.tensorflow.org/deploy/distributed).
+
+You can also [train models on Cloud ML Engine](https://cloud.google.com/ml-engine/docs/getting-started-training-prediction), which provides [hyperparameter tuning](https://cloud.google.com/ml-engine/docs/getting-started-training-prediction#hyperparameter_tuning) to maximize your model's results and enables [deploying your model for prediction](https://cloud.google.com/ml-engine/docs/getting-started-training-prediction#deploy_a_model_to_support_prediction).

official/boosted_trees/data_download.py

+"""Downloads the UCI HIGGS Dataset and prepares train data.
+
+The details on the dataset are in https://archive.ics.uci.edu/ml/datasets/HIGGS
+
+It takes a while as it needs to download 2.8 GB over the network, process, then
+store it into the specified location as a compressed numpy file.
+
+Usage:
+$ python data_download.py --data_dir=/tmp/higgs_data
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import argparse
+import os
+import sys
+import tempfile
+
+import numpy as np
+import pandas as pd
+from six.moves import urllib
+import tensorflow as tf
+
+URL_ROOT = 'https://archive.ics.uci.edu/ml/machine-learning-databases/00280'
+INPUT_FILE = 'HIGGS.csv.gz'
+NPZ_FILE = 'HIGGS.csv.gz.npz'  # numpy compressed file to contain 'data' array.
+
+
+def parse_args():
+  """Parses arguments and returns a tuple (known_args, unparsed_args)."""
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--data_dir', type=str, default='/tmp/higgs_data',
+      help='Directory to download higgs dataset and store training/eval data.')
+  return parser.parse_known_args()
+
+
+def _download_higgs_data_and_save_npz(data_dir):
+  """Download higgs data and store as a numpy compressed file."""
+  input_url = os.path.join(URL_ROOT, INPUT_FILE)
+  np_filename = os.path.join(data_dir, NPZ_FILE)
+  if tf.gfile.Exists(np_filename):
+    raise ValueError('data_dir already has the processed data file: {}'.format(
+        np_filename))
+  if not tf.gfile.Exists(data_dir):
+    tf.gfile.MkDir(data_dir)
+  # 2.8 GB to download.
+  try:
+    print('Data downloading..')
+    temp_filename, _ = urllib.request.urlretrieve(input_url)
+
+    # Reading and parsing 11 million csv lines takes 2~3 minutes.
+    print('Data processing.. taking multiple minutes..')
+    data = pd.read_csv(
+        temp_filename,
+        dtype=np.float32,
+        names=['c%02d' % i for i in range(29)]  # label + 28 features.
+    ).as_matrix()
+  finally:
+    os.remove(temp_filename)
+
+  # Writing to temporary location then copy to the data_dir (0.8 GB).
+  f = tempfile.NamedTemporaryFile()
+  np.savez_compressed(f, data=data)
+  tf.gfile.Copy(f.name, np_filename)
+  print('Data saved to: {}'.format(np_filename))
+
+
+def main(unused_argv):
+  if not tf.gfile.Exists(FLAGS.data_dir):
+    tf.gfile.MkDir(FLAGS.data_dir)
+  _download_higgs_data_and_save_npz(FLAGS.data_dir)
+
+
+if __name__ == '__main__':
+  FLAGS, unparsed = parse_args()
+  tf.app.run(argv=[sys.argv[0]] + unparsed)

official/boosted_trees/train_higgs.py

+r"""A script that builds boosted trees over higgs data.
+
+If you haven't, please run data_download.py beforehand to prepare the data.
+
+For some more details on this example, please refer to README.md as well.
+
+Note that the model_dir is cleaned up before starting the training.
+
+Usage:
+$ python train_higgs.py --n_trees=100 --max_depth=6 --learning_rate=0.1 \
+    --model_dir=/tmp/higgs_model
+
+Note that BoostedTreesClassifier is available since Tensorflow 1.8.0.
+So you need to install recent enough version of Tensorflow to use this example.
+
+The training data is by default the first million examples out of 11M examples,
+and eval data is by default the last million examples.
+They are controlled by --train_start, --train_count, --eval_start, --eval_count.
+e.g. to train over the first 10 million examples instead of 1 million:
+$ python train_higgs.py --n_trees=100 --max_depth=6 --learning_rate=0.1 \
+    --model_dir=/tmp/higgs_model --train_count=10000000
+
+Training history and metrics can be inspected using tensorboard.
+Set --logdir as the --model_dir set by flag when training
+(or the default /tmp/higgs_model).
+$ tensorboard --logdir=/tmp/higgs_model
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import argparse
+import os
+import sys
+
+from absl import app as absl_app
+from absl import flags
+import numpy as np  # pylint: disable=wrong-import-order
+import tensorflow as tf  # pylint: disable=wrong-import-order
+
+from official.utils.flags import core as flags_core
+from official.utils.flags._conventions import help_wrap
+
+
+NPZ_FILE = 'HIGGS.csv.gz.npz'  # numpy compressed file containing 'data' array
+
+
+def define_train_higgs_flags():
+  """Add tree related flags as well as training/eval configuration."""
+  flags_core.define_base(stop_threshold=False, batch_size=False, num_gpu=False)
+  flags.adopt_module_key_flags(flags_core)
+
+  flags.DEFINE_integer(
+      name='train_start', default=0,
+      help=help_wrap('Start index of train examples within the data.'))
+  flags.DEFINE_integer(
+      name='train_count', default=1000000,
+      help=help_wrap('Number of train examples within the data.'))
+  flags.DEFINE_integer(
+      name='eval_start', default=10000000,
+      help=help_wrap('Start index of eval examples within the data.'))
+  flags.DEFINE_integer(
+      name='eval_count', default=1000000,
+      help=help_wrap('Number of eval examples within the data.'))
+
+  flags.DEFINE_integer(
+      'n_trees', default=100, help=help_wrap('Number of trees to build.'))
+  flags.DEFINE_integer(
+      'max_depth', default=6, help=help_wrap('Maximum depths of each tree.'))
+  flags.DEFINE_float(
+      'learning_rate', default=0.1,
+      help=help_wrap('Maximum depths of each tree.'))
+
+  flags_core.set_defaults(data_dir='/tmp/higgs_data',
+                          model_dir='/tmp/higgs_model')
+
+
+
+def read_higgs_data(data_dir, train_start, train_count, eval_start, eval_count):
+  """Reads higgs data from csv and returns train and eval data."""
+  npz_filename = os.path.join(data_dir, NPZ_FILE)
+  try:
+    # gfile allows numpy to read data from network data sources as well.
+    with tf.gfile.Open(npz_filename, 'rb') as npz_file:
+      with np.load(npz_file) as npz:
+        data = npz['data']
+  except Exception as e:
+    raise RuntimeError(
+        'Error loading data; use data_download.py to prepare the data:\n{}: {}'
+        .format(type(e).__name__, e))
+  return (data[train_start:train_start+train_count],
+          data[eval_start:eval_start+eval_count])
+
+
+# This showcases how to make input_fn when the input data is available in the
+# form of numpy arrays.
+def make_inputs_from_np_arrays(features_np, label_np):
+  """Makes and returns input_fn and feature_columns from numpy arrays.
+
+  The generated input_fn will return tf.data.Dataset of feature dictionary and a
+  label, and feature_columns will consist of the list of
+  tf.feature_column.BucketizedColumn.
+
+  Note, for in-memory training, tf.data.Dataset should contain the whole data
+  as a single tensor. Don't use batch.
+
+  Args:
+    features_np: a numpy ndarray (shape=[batch_size, num_features]) for
+        float32 features.
+    label_np: a numpy ndarray (shape=[batch_size, 1]) for labels.
+
+  Returns:
+    input_fn: a function returning a Dataset of feature dict and label.
+    feature_column: a list of tf.feature_column.BucketizedColumn.
+  """
+  num_features = features_np.shape[1]
+  features_np_list = np.split(features_np, num_features, axis=1)
+  # 1-based feature names.
+  feature_names = ['feature_%02d' % (i + 1) for i in range(num_features)]
+
+  # Create source feature_columns and bucketized_columns.
+  def get_bucket_boundaries(feature):
+    """Returns bucket boundaries for feature by percentiles."""
+    return np.unique(np.percentile(feature, range(0, 100))).tolist()
+  source_columns = [
+      tf.feature_column.numeric_column(
+          feature_name, dtype=tf.float32,
+          # Although higgs data have no missing values, in general, default
+          # could be set as 0 or some reasonable value for missing values.
+          default_value=0.0)
+      for feature_name in feature_names
+  ]
+  bucketized_columns = [
+      tf.feature_column.bucketized_column(
+          source_columns[i],
+          boundaries=get_bucket_boundaries(features_np_list[i]))
+      for i in range(num_features)
+  ]
+
+  # Make an input_fn that extracts source features.
+  def input_fn():
+    """Returns features as a dictionary of numpy arrays, and a label."""
+    features = {
+        feature_name: tf.constant(features_np_list[i])
+        for i, feature_name in enumerate(feature_names)
+    }
+    return tf.data.Dataset.zip((tf.data.Dataset.from_tensors(features),
+                                tf.data.Dataset.from_tensors(label_np),))
+
+  return input_fn, bucketized_columns
+
+
+def make_eval_inputs_from_np_arrays(features_np, label_np):
+  """Makes eval input as streaming batches."""
+  num_features = features_np.shape[1]
+  features_np_list = np.split(features_np, num_features, axis=1)
+  # 1-based feature names.
+  feature_names = ['feature_%02d' % (i + 1) for i in range(num_features)]
+
+  def input_fn():
+    features = {
+        feature_name: tf.constant(features_np_list[i])
+        for i, feature_name in enumerate(feature_names)
+    }
+    return tf.data.Dataset.zip(
+        (tf.data.Dataset.from_tensor_slices(features),
+         tf.data.Dataset.from_tensor_slices(label_np),)).batch(1000)
+
+  return input_fn
+
+
+def train_boosted_trees(flags_obj):
+  """Train boosted_trees estimator on HIGGS data.
+
+  Args:
+    flags_obj: An object containing parsed flag values.
+  """
+
+  # Clean up the model directory if present.
+  if tf.gfile.Exists(flags_obj.model_dir):
+    tf.gfile.DeleteRecursively(flags_obj.model_dir)
+  print('## data loading..')
+  train_data, eval_data = read_higgs_data(
+      flags_obj.data_dir, flags_obj.train_start, flags_obj.train_count,
+      flags_obj.eval_start, flags_obj.eval_count)
+  print('## data loaded; train: {}{}, eval: {}{}'.format(
+      train_data.dtype, train_data.shape, eval_data.dtype, eval_data.shape))
+  # data consists of one label column and 28 feature columns following.
+  train_input_fn, feature_columns = make_inputs_from_np_arrays(
+      features_np=train_data[:, 1:], label_np=train_data[:, 0:1])
+  eval_input_fn = make_eval_inputs_from_np_arrays(
+      features_np=eval_data[:, 1:], label_np=eval_data[:, 0:1])
+  print('## features prepared. training starts..')
+
+  # Though BoostedTreesClassifier is under tf.estimator, faster in-memory
+  # training is yet provided as a contrib library.
+  classifier = tf.contrib.estimator.boosted_trees_classifier_train_in_memory(
+      train_input_fn,
+      feature_columns,
+      model_dir=flags_obj.model_dir or None,
+      n_trees=flags_obj.n_trees,
+      max_depth=flags_obj.max_depth,
+      learning_rate=flags_obj.learning_rate)
+
+  # Evaluation.
+  eval_result = classifier.evaluate(eval_input_fn)
+
+  # Exporting the savedmodel.
+  if flags_obj.export_dir is not None:
+    feature_spec = tf.estimator.export.build_parsing_serving_input_receiver_fn(
+        tf.feature_column.make_parse_example_spec(feature_columns))
+    classifier.export_savedmodel(flags_obj.export_dir, feature_spec)
+
+
+def main(_):
+  train_boosted_trees(flags.FLAGS)
+
+
+if __name__ == '__main__':
+  # Training progress and eval results are shown as logging.INFO; so enables it.
+  tf.logging.set_verbosity(tf.logging.INFO)
+  define_train_higgs_flags()
+  absl_app.run(main)

official/boosted_trees/train_higgs_test.csv

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official/boosted_trees/train_higgs_test.py

+# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import tempfile
+
+import numpy as np
+import pandas as pd
+
+import tensorflow as tf  # pylint: disable=g-bad-import-order
+
+from official.utils.testing import integration
+from official.boosted_trees import train_higgs
+
+tf.logging.set_verbosity(tf.logging.ERROR)
+
+
+TEST_CSV = os.path.join(os.path.dirname(__file__), 'train_higgs_test.csv')
+
+class BaseTest(tf.test.TestCase):
+  """Tests for Wide Deep model."""
+
+  @classmethod
+  def setUpClass(cls):  # pylint: disable=invalid-name
+    super(BaseTest, cls).setUpClass()
+    train_higgs.define_train_higgs_flags()
+
+  def setUp(self):
+    # Create temporary CSV file
+    self.data_dir = self.get_temp_dir()
+    data = pd.read_csv(
+        TEST_CSV, dtype=np.float32, names=['c%02d' % i for i in range(29)]
+    ).as_matrix()
+    self.input_npz = os.path.join(self.data_dir, train_higgs.NPZ_FILE)
+    # numpy.savez doesn't take gfile.Gfile, so need to write down and copy.
+    tmpfile = tempfile.NamedTemporaryFile()
+    np.savez_compressed(tmpfile, data=data)
+    tf.gfile.Copy(tmpfile.name, self.input_npz)
+
+  def test_read_higgs_data(self):
+    """Tests read_higgs_data() function."""
+    # Error when a wrong data_dir is given.
+    with self.assertRaisesRegexp(RuntimeError, 'Error loading data.*'):
+      train_data, eval_data = train_higgs.read_higgs_data(
+          self.data_dir + 'non-existing-path',
+          train_start=0, train_count=15, eval_start=15, eval_count=5)
+
+    # Loading fine with the correct data_dir.
+    train_data, eval_data = train_higgs.read_higgs_data(
+        self.data_dir,
+        train_start=0, train_count=15, eval_start=15, eval_count=5)
+    self.assertEqual((15, 29), train_data.shape)
+    self.assertEqual((5, 29), eval_data.shape)
+
+  def test_make_inputs_from_np_arrays(self):
+    """Tests make_inputs_from_np_arrays() function."""
+    train_data, _ = train_higgs.read_higgs_data(
+        self.data_dir,
+        train_start=0, train_count=15, eval_start=15, eval_count=5)
+    input_fn, feature_columns = train_higgs.make_inputs_from_np_arrays(
+        features_np=train_data[:, 1:], label_np=train_data[:, 0:1])
+
+    # Check feature columns.
+    self.assertEqual(28, len(feature_columns))
+    bucketized_column_type = type(
+        tf.feature_column.bucketized_column(
+            tf.feature_column.numeric_column('feature_01'),
+            boundaries=[0, 1, 2]))  # dummy boundaries.
+    for feature_column in feature_columns:
+      self.assertIsInstance(feature_column, bucketized_column_type)
+      # At least 2 boundaries.
+      self.assertGreaterEqual(len(feature_column.boundaries), 2)
+    feature_names = ['feature_%02d' % (i+1) for i in range(28)]
+    # Tests that the source column names of the bucketized columns match.
+    self.assertAllEqual(feature_names,
+                        [col.source_column.name for col in feature_columns])
+
+    # Check features.
+    features, labels = input_fn().make_one_shot_iterator().get_next()
+    with tf.Session() as sess:
+      features, labels = sess.run((features, labels))
+    self.assertIsInstance(features, dict)
+    self.assertAllEqual(feature_names, sorted(features.keys()))
+    self.assertAllEqual([[15, 1]] * 28,
+                        [features[name].shape for name in feature_names])
+    # Validate actual values of some features.
+    self.assertAllClose(
+        [0.869293, 0.907542, 0.798834, 1.344384, 1.105009, 1.595839,
+         0.409391, 0.933895, 1.405143, 1.176565, 0.945974, 0.739356,
+         1.384097, 1.383548, 1.343652],
+        np.squeeze(features[feature_names[0]], 1))
+    self.assertAllClose(
+        [-0.653674, -0.213641, 1.540659, -0.676015, 1.020974, 0.643109,
+         -1.038338, -2.653732, 0.567342, 0.534315, 0.720819, -0.481741,
+         1.409523, -0.307865, 1.474605],
+        np.squeeze(features[feature_names[10]], 1))
+
+  def test_end_to_end(self):
+    """Tests end-to-end running."""
+    model_dir = os.path.join(self.get_temp_dir(), 'model')
+    integration.run_synthetic(
+        main=train_higgs.main, tmp_root=self.get_temp_dir(), extra_flags=[
+            '--data_dir', self.data_dir,
+            '--model_dir', model_dir,
+            '--n_trees', '5',
+            '--train_start', '0',
+            '--train_count', '12',
+            '--eval_start', '12',
+            '--eval_count', '8',
+        ],
+        synth=False, max_train=None)
+    self.assertTrue(tf.gfile.Exists(os.path.join(model_dir, 'checkpoint')))
+
+  def test_end_to_end_with_export(self):
+    """Tests end-to-end running."""
+    model_dir = os.path.join(self.get_temp_dir(), 'model')
+    export_dir = os.path.join(self.get_temp_dir(), 'export')
+    integration.run_synthetic(
+        main=train_higgs.main, tmp_root=self.get_temp_dir(), extra_flags=[
+            '--data_dir', self.data_dir,
+            '--model_dir', model_dir,
+            '--export_dir', export_dir,
+            '--n_trees', '5',
+            '--train_start', '0',
+            '--train_count', '12',
+            '--eval_start', '12',
+            '--eval_count', '8',
+        ],
+        synth=False, max_train=None)
+    self.assertTrue(tf.gfile.Exists(os.path.join(model_dir, 'checkpoint')))
+    self.assertTrue(tf.gfile.Exists(os.path.join(export_dir)))
+
+
+if __name__ == '__main__':
+  tf.test.main()

official/requirements.txt

+numpy
+pandas
 psutil>=5.4.3
 py-cpuinfo>=3.3.0
-google-cloud-bigquery>=0.31.0
+google-cloud-bigquery>=0.31.0
\ No newline at end of file