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Bi-LSTM+CRF.py
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Bi-LSTM+CRF.py
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import tensorflow as tf
import numpy as np
import os, argparse, time, random
from model import BiLSTM_CRF
from utils import str2bool, get_logger, get_entity
from data import read_corpus, read_dictionary, tag2label, random_embedding, vocab_build
## Session configuration
os.environ['CUDA_VISIBLE_DEVICES'] = '-1' # Only device 1 will be seen.
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
# os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2' # default: 0
config = tf.ConfigProto(log_device_placement=True, allow_soft_placement=True)
config.gpu_options.allow_growth = False
# config.gpu_options.per_process_gpu_memory_fraction = 0.5 # setting code take up 40% memory
Path = 'D:\\resource\\general_hypernym_extraction\\data'
## hyperparameters setting
parser = argparse.ArgumentParser(description='BiLSTM-CRF for Chinese NER task')
parser.add_argument('--train_data', type=str, default=Path, help='train data source')
parser.add_argument('--test_data', type=str, default=Path, help='test data source')
parser.add_argument('--batch_size', type=int, default=2, help='sample of each minibatch')
parser.add_argument('--epoch', type=int, default=5, help='epoch of training')
parser.add_argument('--hidden_dim', type=int, default=64, help='dim of hidden state')
parser.add_argument('--optimizer', type=str, default='Adam', help='Adam/Adadelta/Adagrad/RMSProp/Momentum/SGD')
parser.add_argument('--CRF', type=str2bool, default=True, help='use CRF at the top layer. if False, use Softmax')
parser.add_argument('--lr', type=float, default=0.001, help='learning rate')
parser.add_argument('--clip', type=float, default=5.0, help='gradient clipping')
parser.add_argument('--dropout', type=float, default=0.5, help='dropout keep_prob')
parser.add_argument('--update_embedding', type=str2bool, default=True, help='update embedding during training')
parser.add_argument('--pretrain_embedding', type=str, default='random', help='use pretrained char embedding or init it randomly')
parser.add_argument('--embedding_dim', type=int, default=100, help='random init char embedding_dim')
parser.add_argument('--shuffle', type=str2bool, default=True, help='shuffle training data before each epoch')
parser.add_argument('--mode', type=str, default='train', help='train/test/demo')
parser.add_argument('--demo_model', type=str, default='1521112368', help='model for test and demo')
args = parser.parse_args()
# Creating .pkl file
vocab_build(Path+'\\word2id.pkl', Path+'\\vocab.txt', 3)
# get char embeddings
word2id = read_dictionary(Path+'\\word2id.pkl')
if args.pretrain_embedding == 'random':
embeddings = random_embedding(word2id, args.embedding_dim)
else:
embedding_path = 'pretrain_embedding.npy'
embeddings = np.array(np.load(embedding_path), dtype='float32')
## read corpus and get training data
if args.mode != 'demo':
train_path = 'D:\\resource\\general_hypernym_extraction\\data\\train.txt'
test_path = 'D:\\resource\\general_hypernym_extraction\\data\\valid.txt'
train_data = read_corpus(train_path)
test_data = read_corpus(test_path)
test_size = len(test_data)
## paths setting
paths = {}
timestamp = str(int(time.time())) if args.mode == 'train' else args.demo_model
# Creating folder to saving the results
output_path = os.path.join('.', args.train_data+"_save_word2vec_bi_lstf_crf", timestamp)
if not os.path.exists(output_path): os.makedirs(output_path)
# Training log folder
summary_path = os.path.join(output_path, "summaries")
paths['summary_path'] = summary_path
# Model folder
if not os.path.exists(summary_path): os.makedirs(summary_path)
model_path = os.path.join(output_path, "checkpoints/")
if not os.path.exists(model_path): os.makedirs(model_path)
ckpt_prefix = os.path.join(model_path, "model")
paths['model_path'] = ckpt_prefix
# Results folder
result_path = os.path.join(output_path, "results")
paths['result_path'] = result_path
if not os.path.exists(result_path): os.makedirs(result_path)
# Creating a folder to saving the log information
log_path = os.path.join(result_path, "log.txt")
paths['log_path'] = log_path
get_logger(log_path).info(str(args))
## training model
if args.mode == 'train':
model = BiLSTM_CRF(args, embeddings, tag2label, word2id, paths, config=config)
# Creating model
model.build_graph()
## hyperparameters-tuning, split train/dev
# dev_data = train_data[:5000]; dev_size = len(dev_data)
# train_data = train_data[5000:]; train_size = len(train_data)
# print("train data: {0}\ndev data: {1}".format(train_size, dev_size))
# model.train(train=train_data, dev=dev_data)
## train model on the whole training data
print("train data: {}".format(len(train_data)))
model.train(train=train_data, dev=test_data) # use test_data as the dev_data to see overfitting phenomena
## testing model
elif args.mode == 'test':
ckpt_file = tf.train.latest_checkpoint(model_path)
print(ckpt_file)
paths['model_path'] = ckpt_file
model = BiLSTM_CRF(args, embeddings, tag2label, word2id, paths, config=config)
model.build_graph()
print("test data: {}".format(test_size))
model.test(test_data)
## demo
elif args.mode == 'demo':
ckpt_file = tf.train.latest_checkpoint(model_path)
print(ckpt_file)
paths['model_path'] = ckpt_file
model = BiLSTM_CRF(args, embeddings, tag2label, word2id, paths, config=config)
model.build_graph()
saver = tf.train.Saver()
with tf.Session(config=config) as sess:
print('============= demo =============')
saver.restore(sess, ckpt_file)
while(1):
print('Please input your sentence:')
demo_sent = input()
if demo_sent == '' or demo_sent.isspace():
print('See you next time!')
break
else:
demo_sent = list(demo_sent.strip())
demo_data = [(demo_sent, ['O'] * len(demo_sent))]
tag = model.demo_one(sess, demo_data)
ENT, HYPER = get_entity(tag, demo_sent)
print('ENT: {}\nHYPER: {}'.format(ENT, HYPER))