未验证 提交 8b30e2ab 编写于 作者: F fengjiayi 提交者: GitHub

Book chap6 (#5321)

* init

* Fix bug

* rename test_filw

* refine test
上级 5c1ed011
import paddle.v2 as paddle
import paddle.v2.framework.layers as layers
import paddle.v2.framework.nets as nets
import paddle.v2.framework.core as core
import paddle.v2.framework.optimizer as optimizer
from paddle.v2.framework.framework import Program, g_program, g_init_program
from paddle.v2.framework.executor import Executor
import numpy as np
def convolution_net(input_dim, class_dim=2, emb_dim=32, hid_dim=32):
data = layers.data(name="words", shape=[1], data_type="int64")
label = layers.data(name="label", shape=[1], data_type="int64")
emb = layers.embedding(input=data, size=[input_dim, emb_dim])
conv_3 = nets.sequence_conv_pool(
input=emb,
num_filters=hid_dim,
filter_size=3,
act="tanh",
pool_type="sqrt")
conv_4 = nets.sequence_conv_pool(
input=emb,
num_filters=hid_dim,
filter_size=4,
act="tanh",
pool_type="sqrt")
prediction = layers.fc(input=[conv_3, conv_4],
size=class_dim,
act="softmax")
cost = layers.cross_entropy(input=prediction, label=label)
avg_cost = layers.mean(x=cost)
adam_optimizer = optimizer.AdamOptimizer(learning_rate=0.002)
opts = adam_optimizer.minimize(avg_cost)
acc = layers.accuracy(input=prediction, label=label)
return avg_cost, acc
def to_lodtensor(data, place):
seq_lens = [len(seq) for seq in data]
cur_len = 0
lod = [cur_len]
for l in seq_lens:
cur_len += l
lod.append(cur_len)
flattened_data = np.concatenate(data, axis=0).astype("int64")
flattened_data = flattened_data.reshape([len(flattened_data), 1])
res = core.LoDTensor()
res.set(flattened_data, place)
res.set_lod([lod])
return res
def main():
BATCH_SIZE = 100
PASS_NUM = 5
word_dict = paddle.dataset.imdb.word_dict()
dict_dim = len(word_dict)
class_dim = 2
cost, acc = convolution_net(input_dim=dict_dim, class_dim=class_dim)
train_data = paddle.batch(
paddle.reader.shuffle(
paddle.dataset.imdb.train(word_dict), buf_size=1000),
batch_size=BATCH_SIZE)
place = core.CPUPlace()
exe = Executor(place)
exe.run(g_init_program)
for pass_id in xrange(PASS_NUM):
for data in train_data():
tensor_words = to_lodtensor(map(lambda x: x[0], data), place)
label = np.array(map(lambda x: x[1], data)).astype("int64")
label = label.reshape([BATCH_SIZE, 1])
tensor_label = core.LoDTensor()
tensor_label.set(label, place)
outs = exe.run(g_program,
feed={"words": tensor_words,
"label": tensor_label},
fetch_list=[cost, acc])
cost_val = np.array(outs[0])
acc_val = np.array(outs[1])
print("cost=" + str(cost_val) + " acc=" + str(acc_val))
if cost_val < 1.0 and acc_val > 0.7:
exit(0)
exit(1)
if __name__ == '__main__':
main()
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