Yu Yang
8 years ago
commit
8efdc77276
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import math
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import paddle.v2 as paddle
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dictsize = 1953
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embsize = 32
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hiddensize = 256
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N = 5
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def wordemb(inlayer):
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wordemb = paddle.layer.table_projection(
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input=inlayer,
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size=embsize,
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param_attr=paddle.attr.Param(
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name="_proj",
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initial_std=0.001,
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learning_rate=1,
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l2_rate=0, ))
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return wordemb
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def main():
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paddle.init(use_gpu=False, trainer_count=1)
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word_dict = paddle.dataset.imikolov.build_dict()
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dict_size = len(word_dict)
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firstword = paddle.layer.data(
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name="firstw", type=paddle.data_type.integer_value(dict_size))
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secondword = paddle.layer.data(
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name="secondw", type=paddle.data_type.integer_value(dict_size))
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thirdword = paddle.layer.data(
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name="thirdw", type=paddle.data_type.integer_value(dict_size))
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fourthword = paddle.layer.data(
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name="fourthw", type=paddle.data_type.integer_value(dict_size))
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nextword = paddle.layer.data(
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name="fifthw", type=paddle.data_type.integer_value(dict_size))
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Efirst = wordemb(firstword)
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Esecond = wordemb(secondword)
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Ethird = wordemb(thirdword)
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Efourth = wordemb(fourthword)
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contextemb = paddle.layer.concat(input=[Efirst, Esecond, Ethird, Efourth])
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hidden1 = paddle.layer.fc(input=contextemb,
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size=hiddensize,
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act=paddle.activation.Sigmoid(),
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layer_attr=paddle.attr.Extra(drop_rate=0.5),
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bias_attr=paddle.attr.Param(learning_rate=2),
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param_attr=paddle.attr.Param(
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initial_std=1. / math.sqrt(embsize * 8),
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learning_rate=1))
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predictword = paddle.layer.fc(input=hidden1,
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size=dict_size,
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bias_attr=paddle.attr.Param(learning_rate=2),
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act=paddle.activation.Softmax())
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def event_handler(event):
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if isinstance(event, paddle.event.EndIteration):
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if event.batch_id % 100 == 0:
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result = trainer.test(
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paddle.batch(
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paddle.dataset.imikolov.test(word_dict, N), 32))
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print "Pass %d, Batch %d, Cost %f, %s, Testing metrics %s" % (
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event.pass_id, event.batch_id, event.cost, event.metrics,
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result.metrics)
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cost = paddle.layer.classification_cost(input=predictword, label=nextword)
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parameters = paddle.parameters.create(cost)
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adam_optimizer = paddle.optimizer.Adam(
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learning_rate=3e-3,
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regularization=paddle.optimizer.L2Regularization(8e-4))
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trainer = paddle.trainer.SGD(cost, parameters, adam_optimizer)
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trainer.train(
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paddle.batch(paddle.dataset.imikolov.train(word_dict, N), 32),
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num_passes=30,
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event_handler=event_handler)
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if __name__ == '__main__':
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main()
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@ -0,0 +1,142 @@
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# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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wmt14 dataset
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"""
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import paddle.v2.dataset.common
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import tarfile
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import os.path
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import itertools
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__all__ = ['train', 'test', 'build_dict']
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URL_DEV_TEST = 'http://www-lium.univ-lemans.fr/~schwenk/cslm_joint_paper/data/dev+test.tgz'
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MD5_DEV_TEST = '7d7897317ddd8ba0ae5c5fa7248d3ff5'
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URL_TRAIN = 'http://localhost:8000/train.tgz'
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MD5_TRAIN = '72de99da2830ea5a3a2c4eb36092bbc7'
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def word_count(f, word_freq=None):
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add = paddle.v2.dataset.common.dict_add
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if word_freq == None:
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word_freq = {}
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for l in f:
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for w in l.strip().split():
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add(word_freq, w)
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add(word_freq, '<s>')
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add(word_freq, '<e>')
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return word_freq
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def get_word_dix(word_freq):
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TYPO_FREQ = 50
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word_freq = filter(lambda x: x[1] > TYPO_FREQ, word_freq.items())
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word_freq_sorted = sorted(word_freq, key=lambda x: (-x[1], x[0]))
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words, _ = list(zip(*word_freq_sorted))
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word_idx = dict(zip(words, xrange(len(words))))
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word_idx['<unk>'] = len(words)
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return word_idx
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def get_word_freq(train, dev):
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word_freq = word_count(train, word_count(dev))
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if '<unk>' in word_freq:
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# remove <unk> for now, since we will set it as last index
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del word_freq['<unk>']
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return word_freq
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def build_dict():
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base_dir = './wmt14-data'
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train_en_filename = base_dir + '/train/train.en'
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train_fr_filename = base_dir + '/train/train.fr'
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dev_en_filename = base_dir + '/dev/ntst1213.en'
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dev_fr_filename = base_dir + '/dev/ntst1213.fr'
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if not os.path.exists(train_en_filename) or not os.path.exists(
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train_fr_filename):
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with tarfile.open(
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paddle.v2.dataset.common.download(URL_TRAIN, 'wmt14',
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MD5_TRAIN)) as tf:
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tf.extractall(base_dir)
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if not os.path.exists(dev_en_filename) or not os.path.exists(
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dev_fr_filename):
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with tarfile.open(
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paddle.v2.dataset.common.download(URL_DEV_TEST, 'wmt14',
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MD5_DEV_TEST)) as tf:
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tf.extractall(base_dir)
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f_en = open(train_en_filename)
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f_fr = open(train_fr_filename)
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f_en_dev = open(dev_en_filename)
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f_fr_dev = open(dev_fr_filename)
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word_freq_en = get_word_freq(f_en, f_en_dev)
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word_freq_fr = get_word_freq(f_fr, f_fr_dev)
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f_en.close()
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f_fr.close()
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f_en_dev.close()
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f_fr_dev.close()
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return get_word_dix(word_freq_en), get_word_dix(word_freq_fr)
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def reader_creator(directory, path_en, path_fr, URL, MD5, dict_en, dict_fr):
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def reader():
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if not os.path.exists(path_en) or not os.path.exists(path_fr):
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with tarfile.open(
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paddle.v2.dataset.common.download(URL, 'wmt14', MD5)) as tf:
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tf.extractall(directory)
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f_en = open(path_en)
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f_fr = open(path_fr)
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UNK_en = dict_en['<unk>']
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UNK_fr = dict_fr['<unk>']
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for en, fr in itertools.izip(f_en, f_fr):
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src_ids = [dict_en.get(w, UNK_en) for w in en.strip().split()]
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tar_ids = [
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dict_fr.get(w, UNK_fr)
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for w in ['<s>'] + fr.strip().split() + ['<e>']
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]
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# remove sequence whose length > 80 in training mode
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if len(src_ids) == 0 or len(tar_ids) <= 1 or len(
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src_ids) > 80 or len(tar_ids) > 80:
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continue
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yield src_ids, tar_ids[:-1], tar_ids[1:]
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f_en.close()
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f_fr.close()
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return reader
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def train(dict_en, dict_fr):
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directory = './wmt14-data'
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return reader_creator(directory, directory + '/train/train.en',
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directory + '/train/train.fr', URL_TRAIN, MD5_TRAIN,
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dict_en, dict_fr)
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def test(dict_en, dict_fr):
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directory = './wmt14-data'
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return reader_creator(directory, directory + '/dev/ntst1213.en',
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directory + '/dev/ntst1213.fr', URL_DEV_TEST,
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MD5_DEV_TEST, dict_en, dict_fr)
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@ -0,0 +1,41 @@
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# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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__all__ = ['batch']
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def batch(reader, batch_size):
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"""
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Create a batched reader.
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:param reader: the data reader to read from.
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:type reader: callable
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:param batch_size: size of each mini-batch
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:type batch_size: int
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:return: the batched reader.
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:rtype: callable
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"""
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def batch_reader():
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r = reader()
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b = []
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for instance in r:
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b.append(instance)
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if len(b) == batch_size:
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yield b
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b = []
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if b:
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yield b
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return batch_reader
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