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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.
# ==============================================================================
"""Sequence-to-sequence tests."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import numpy as np
from tensorflow.contrib.learn.python.learn import ops
from tensorflow.python.framework import dtypes
from tensorflow.python.ops import array_ops
from tensorflow.python.ops import rnn_cell
from tensorflow.python.platform import test
class Seq2SeqOpsTest(test.TestCase):
"""Sequence-to-sequence tests."""
def test_sequence_classifier(self):
with self.test_session() as session:
decoding = [
array_ops.placeholder(dtypes.float32, [2, 2]) for _ in range(3)
]
labels = [array_ops.placeholder(dtypes.float32, [2, 2]) for _ in range(3)]
sampling_decoding = [
array_ops.placeholder(dtypes.float32, [2, 2]) for _ in range(3)
]
predictions, loss = ops.sequence_classifier(decoding, labels,
sampling_decoding)
pred, cost = session.run(
[predictions, loss],
feed_dict={
decoding[0].name: [[0.1, 0.9], [0.7, 0.3]],
decoding[1].name: [[0.9, 0.1], [0.8, 0.2]],
decoding[2].name: [[0.5, 0.5], [0.4, 0.6]],
labels[0].name: [[1, 0], [0, 1]],
labels[1].name: [[1, 0], [0, 1]],
labels[2].name: [[1, 0], [0, 1]],
sampling_decoding[0].name: [[0.1, 0.9], [0.7, 0.3]],
sampling_decoding[1].name: [[0.9, 0.1], [0.8, 0.2]],
sampling_decoding[2].name: [[0.5, 0.5], [0.4, 0.6]],
})
self.assertAllEqual(pred.argmax(axis=2), [[1, 0, 0], [0, 0, 1]])
self.assertAllClose(cost, 4.7839908599)
def test_seq2seq_inputs(self):
inp = np.array([[[1, 0], [0, 1], [1, 0]], [[0, 1], [1, 0], [0, 1]]])
out = np.array([[[0, 1, 0], [1, 0, 0]], [[1, 0, 0], [0, 1, 0]]])
with self.test_session() as session:
x = array_ops.placeholder(dtypes.float32, [2, 3, 2])
y = array_ops.placeholder(dtypes.float32, [2, 2, 3])
in_x, in_y, out_y = ops.seq2seq_inputs(x, y, 3, 2)
enc_inp = session.run(in_x, feed_dict={x.name: inp})
dec_inp = session.run(in_y, feed_dict={x.name: inp, y.name: out})
dec_out = session.run(out_y, feed_dict={x.name: inp, y.name: out})
# Swaps from batch x len x height to list of len of batch x height.
self.assertAllEqual(enc_inp, np.swapaxes(inp, 0, 1))
self.assertAllEqual(dec_inp, [[[0, 0, 0], [0, 0, 0]],
[[0, 1, 0], [1, 0, 0]],
[[1, 0, 0], [0, 1, 0]]])
self.assertAllEqual(dec_out, [[[0, 1, 0], [1, 0, 0]],
[[1, 0, 0], [0, 1, 0]],
[[0, 0, 0], [0, 0, 0]]])
def test_rnn_decoder(self):
with self.test_session():
decoder_inputs = [
array_ops.placeholder(dtypes.float32, [2, 2]) for _ in range(3)
]
encoding = array_ops.placeholder(dtypes.float32, [2, 2])
cell = rnn_cell.GRUCell(2)
outputs, states, sampling_outputs, sampling_states = (
ops.rnn_decoder(decoder_inputs, encoding, cell))
self.assertEqual(len(outputs), 3)
self.assertEqual(outputs[0].get_shape(), [2, 2])
self.assertEqual(len(states), 4)
self.assertEqual(states[0].get_shape(), [2, 2])
self.assertEqual(len(sampling_outputs), 3)
self.assertEqual(sampling_outputs[0].get_shape(), [2, 2])
self.assertEqual(len(sampling_states), 4)
self.assertEqual(sampling_states[0].get_shape(), [2, 2])
if __name__ == "__main__":
test.main()
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