def init():
path = config.data_path
config.embedding_file = os.path.join(path, config.embedding_file)
config.train_file = os.path.join(path, config.train_file)
config.dev_file = os.path.join(path, config.dev_file)
config.test_file = os.path.join(path, config.test_file)
dim = utils.get_dim(config.embedding_file)
config.embedding_size = dim
# Config log
if config.log_file is None:
logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s %(message)s', datefmt='%m-%d %H:%M')
else:
logging.basicConfig(filename=config.log_file,
filemode='w', level=logging.DEBUG,
format='%(asctime)s %(message)s', datefmt='%m-%d %H:%M')
# Load data
logging.info('-' * 50)
logging.info('Load data files..')
if config.debug:
logging.info('*' * 10 + ' Train')
train_examples = utils.load_data(config.train_file, 1000)
logging.info('*' * 10 + ' Dev')
dev_examples = utils.load_data(config.dev_file, 100)
else:
logging.info('*' * 10 + ' Train')
train_examples = utils.load_data(config.train_file)
logging.info('*' * 10 + ' Dev')
dev_examples = utils.load_data(config.dev_file)
config.num_train = len(train_examples[0])
config.num_dev = len(dev_examples[0])
# Build dictionary
logging.info('-' * 50)
logging.info('Build dictionary..')
word_dict = utils.build_dict(train_examples[0] + train_examples[1])
entity_markers = list(set( [w for w in word_dict.keys()
if w.startswith('@entity')] + train_examples[2] ))
entity_markers = ['<unk_entity>'] + entity_markers
entity_dict = {w: index for (index, w) in enumerate(entity_markers)}
logging.info('Entity markers: %d' % len(entity_dict))
config.num_labels = len(entity_dict)
logging.info('-' * 50)
logging.info('Load embedding file..')
embeddings = utils.gen_embeddings(word_dict, config.embedding_size, config.embedding_file)
(config.vocab_size, config.embedding_size) = embeddings.shape
# Log parameters
flags = config.__dict__['__flags']
flag_str = "\n"
for k in flags:
flag_str += "\t%s:\t%s\n" % (k, flags[k])
logging.info(flag_str)
# Vectorize test data
logging.info('-' * 50)
logging.info('Vectorize test data..')
# d: document, q: question, a:answer
# l: whether the entity label occurs in the document
dev_d, dev_q, dev_l, dev_a = utils.vectorize(dev_examples, word_dict, entity_dict)
assert len(dev_d) == config.num_dev
all_dev = utils.gen_examples(dev_d, dev_q, dev_l, dev_a, config.batch_size)
if config.test_only:
return embeddings, all_dev, None
# Vectorize training data
logging.info('-' * 50)
logging.info('Vectorize training data..')
train_d, train_q, train_l, train_a = utils.vectorize(train_examples, word_dict, entity_dict)
assert len(train_d) == config.num_train
all_train = utils.gen_examples(train_d, train_q, train_l, train_a, config.batch_size)
return embeddings, all_dev, all_train
def main(args):
# code.interact(local=locals())
# 1.加载数据
# 加载句子
train_en, train_cn = utils.load_data(args.train_file)
dev_en, dev_cn = utils.load_data(args.dev_file)
# 参数存储
args.num_train = len(train_en)
args.num_dev = len(dev_en)
# 2.构建单词字典
if os.path.isfile(args.vocab_file):
en_dict, cn_dict, en_total_words, cn_total_words = pickle.load(
open(args.vocab_file, "rb"))
else:
# 获取字典
en_dict, en_total_words = utils.build_dict(train_en)
cn_dict, cn_total_words = utils.build_dict(train_cn)
pickle.dump([en_dict, cn_dict, en_total_words, cn_total_words],
open(args.vocab_file, "wb"))
# 参数存储
args.en_total_words = en_total_words
args.cn_total_words = cn_total_words
# 翻转字典，转换为数字->单词
inv_en_dict = {v: k for k, v in en_dict.items()}
inv_cn_dict = {v: k for k, v in cn_dict.items()}
# 编码单词，单词->数字
train_en, train_cn = utils.encode(train_en, train_cn, en_dict, cn_dict)
dev_en, dev_cn = utils.encode(dev_en, dev_cn, en_dict, cn_dict)
# convert to numpy tensors
train_data = utils.gen_examples(train_en, train_cn, args.batch_size)
dev_data = utils.gen_examples(dev_en, dev_cn, args.batch_size)
# 初始化模型
if os.path.isfile(args.model_file):
model = torch.load(args.model_file)
elif args.model == "EncoderDecoderModel":
model = EncoderDecoderModel(args)
if args.use_cuda:
model = model.cuda()
# 交叉熵loss函数
crit = utils.LanguageModelCriterion()
# 指标评估
print("start evaluating on dev...")
correct_count, loss, num_words = eval(model, dev_data, args, crit)
loss = loss / num_words
acc = correct_count / num_words
print("dev loss %s" % (loss))
print("dev accuracy %f" % (acc))
print("dev total number of words %f" % (num_words))
best_acc = acc
# 定义学习率
learning_rate = args.learning_rate
# 定义优化器
optimizer = getattr(optim, args.optimizer)(model.parameters(),
lr=learning_rate)
total_num_sentences = 0.
total_time = 0.
for epoch in range(args.num_epoches):
np.random.shuffle(train_data)
total_train_loss = 0.
total_num_words = 0.
# 获取训练数据和序列下标
for idx, (mb_x, mb_x_mask, mb_y,
mb_y_mask) in tqdm(enumerate(train_data)):
# 获取mini batch size
batch_size = mb_x.shape[0]
total_num_sentences += batch_size
# 将numpy的tensor数据类型转换为torch的tensor，再套上variable
mb_x = Variable(torch.from_numpy(mb_x)).long()
mb_x_mask = Variable(torch.from_numpy(mb_x_mask)).long()
# LSTM隐层state
hidden = model.init_hidden(batch_size)
# 预测句子的给定前缀
mb_input = Variable(torch.from_numpy(mb_y[:, :-1])).long()
# 预测句子的目标后缀
mb_out = Variable(torch.from_numpy(mb_y[:, 1:])).long()
mb_out_mask = Variable(torch.from_numpy(mb_y_mask[:, 1:]))
if args.use_cuda:
mb_x = mb_x.cuda()
mb_x_mask = mb_x_mask.cuda()
mb_input = mb_input.cuda()
mb_out = mb_out.cuda()
mb_out_mask = mb_out_mask.cuda()
# 模型预测函数
mb_pred, hidden = model(mb_x, mb_x_mask, mb_input, hidden)
# 交叉熵损失函数衡量pred和out差距
loss = crit(mb_pred, mb_out, mb_out_mask)
num_words = torch.sum(mb_out_mask).data[0]
total_train_loss += loss.data[0] * num_words
total_num_words += num_words
# 更新模型
# 首先清空模型梯度数据
optimizer.zero_grad()
# 计算loss对parameter的梯度
loss.backward()
# 实行梯度下降
optimizer.step()
# 打印loss值
print("training loss: %f" % (total_train_loss / total_num_words))
# 评估每一轮迭代
if (epoch + 1) % args.eval_epoch == 0:
print("start evaluating on dev...")
# 获取参数
correct_count, loss, num_words = eval(model, dev_data, args, crit)
# 计算损失和准确率
loss = loss / num_words
acc = correct_count / num_words
print("dev loss %s" % (loss))
print("dev accuracy %f" % (acc))
print("dev total number of words %f" % (num_words))
# 存储最优准确率模型
if acc >= best_acc:
torch.save(model, args.model_file)
best_acc = acc
print("model saved...")
else:
learning_rate *= 0.5
optimizer = getattr(optim, args.optimizer)(model.parameters(),
lr=learning_rate)
# 打印最佳准确率
print("best dev accuracy: %f" % best_acc)
print("#" * 60)
# 加载数据
test_en, test_cn = utils.load_data(args.test_file)
args.num_test = len(test_en)
test_en, test_cn = utils.encode(test_en, test_cn, en_dict, cn_dict)
test_data = utils.gen_examples(test_en, test_cn, args.batch_size)
# 测试集评估
correct_count, loss, num_words = eval(model, test_data, args, crit)
loss = loss / num_words
acc = correct_count / num_words
print("test loss %s" % (loss))
print("test accuracy %f" % (acc))
print("test total number of words %f" % (num_words))
# 训练集评估
correct_count, loss, num_words = eval(model, train_data, args, crit)
loss = loss / num_words
acc = correct_count / num_words
print("train loss %s" % (loss))
print("train accuracy %f" % (acc))
