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+# Copyright 2016 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.
+# ==============================================================================
+"""tfdbg example: debugging tf.keras models training on tf.data.Dataset."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import argparse
+import sys
+
+import numpy as np
+import tensorflow as tf
+
+from tensorflow.python import debug as tf_debug
+
+
+def main(_):
+ # Create a dummy dataset.
+ num_examples = 8
+ steps_per_epoch = 2
+ input_dims = 3
+ output_dims = 1
+ xs = np.zeros([num_examples, input_dims])
+ ys = np.zeros([num_examples, output_dims])
+ dataset = tf.data.Dataset.from_tensor_slices(
+ (xs, ys)).repeat(num_examples).batch(int(num_examples / steps_per_epoch))
+
+ sess = tf.Session()
+ if FLAGS.debug:
+ # Use the command-line interface (CLI) of tfdbg.
+ sess = tf_debug.LocalCLIDebugWrapperSession(sess, ui_type=FLAGS.ui_type)
+ elif FLAGS.tensorboard_debug_address:
+ # Use the TensorBoard Debugger Plugin (GUI of tfdbg).
+ sess = tf_debug.TensorBoardDebugWrapperSession(
+ sess, FLAGS.tensorboard_debug_address)
+ tf.keras.backend.set_session(sess)
+
+ # Create a dummy model.
+ model = tf.keras.Sequential([
+ tf.keras.layers.Dense(1, input_shape=[input_dims])])
+ model.compile(loss="mse", optimizer="sgd")
+
+ # Train the model using the dummy dataset created above.
+ model.fit(dataset, epochs=FLAGS.epochs, steps_per_epoch=steps_per_epoch)
+
+
+if __name__ == "__main__":
+ parser = argparse.ArgumentParser()
+ parser.register("type", "bool", lambda v: v.lower() == "true")
+ parser.add_argument(
+ "--debug",
+ type="bool",
+ nargs="?",
+ const=True,
+ default=False,
+ help="Use debugger to track down bad values during training. "
+ "Mutually exclusive with the --tensorboard_debug_address flag.")
+ parser.add_argument(
+ "--ui_type",
+ type=str,
+ default="curses",
+ help="Command-line user interface type (curses | readline).")
+ parser.add_argument(
+ "--tensorboard_debug_address",
+ type=str,
+ default=None,
+ help="Connect to the TensorBoard Debugger Plugin backend specified by "
+ "the gRPC address (e.g., localhost:1234). Mutually exclusive with the "
+ "--debug flag.")
+ parser.add_argument(
+ "--epochs",
+ type=int,
+ default=2,
+ help="Number of epochs to train the model for.")
+ FLAGS, unparsed = parser.parse_known_args()
+ tf.app.run(main=main, argv=[sys.argv[0]] + unparsed)