class ChineseNER:
def __init__(self, entry="train"):
# Load some Hyper-parameters
config = load_config()
self.embedding_size = config.get("embedding_size")
self.hidden_size = config.get("hidden_size")
self.batch_size = config.get("batch_size")
self.model_path = config.get("model_path")
self.dropout = config.get("dropout")
self.tags = config.get("tags")
self.learning_rate = config.get("learning_rate")
self.epochs = config.get("epochs")
self.weight_decay = config.get("weight_decay")
self.transfer_learning = config.get("transfer_learning")
self.lr_decay_step = config.get("lr_decay_step")
self.lr_decay_rate = config.get("lr_decay_rate")
self.max_length = config.get("max_length")
# Model Initialization
self.main_model(entry)
def main_model(self, entry):
"""
Model Initialization
"""
# The Training Process
if entry == "train":
# Training Process: read Training Data from DataManager
self.train_manager = DataManager(batch_size=self.batch_size,
data_type='train',
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
# Read the corresponding character index (vocab) and other hyper-parameters
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
save_params(data=data, path=self.model_path)
# Build BiLSTM-CRF Model
self.model = BiLSTMCRF(tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
max_length=self.max_length)
# Evaluation Process: read Dev Data from DataManager
self.dev_size = DataManager(batch_size=1,
data_type="dev",
tags=self.tags).load_data()
self.dev_manager = DataManager(batch_size=int(self.dev_size),
data_type="dev",
tags=self.tags)
self.dev_batch = self.dev_manager.iteration()
# Restore model if it exists
self.restore_model()
# The Testing & Inference Process
elif entry == "predict":
data_map = load_params(path=self.model_path)
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
dropout=0.0,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
max_length=self.max_length)
self.restore_model()
def restore_model(self):
"""
Restore the model if there is one
"""
try:
self.model.load_state_dict(
torch.load(self.model_path + "params.pkl"))
print("Model Successfully Restored!")
except Exception as error:
print("Model Failed to restore! {}".format(error))
def train(self):
"""
Training stage
"""
model = self.model.to(device=device)
# Transfer Learning Module
if self.transfer_learning == True:
keep_grad = [
"transitions", "word_embeddings.weight", "hidden2tag.weight",
"hidden2tag.bias", "linear1.weight", "linear1.bias",
"linear2.weight", "linear2.bias"
]
for name, value in model.named_parameters():
if name in keep_grad:
value.requires_grad = True
else:
value.requires_grad = False
else:
for name, value in model.named_parameters():
value.requires_grad = True
# Use Adam Optimizer
optimizer = optim.AdamW(params=filter(lambda p: p.requires_grad,
model.parameters()),
lr=self.learning_rate,
weight_decay=self.weight_decay,
amsgrad=True)
# Learning Rate Decay
# scheduler = optim.lr_scheduler.StepLR(optimizer=optimizer, step_size=self.lr_decay_step, gamma=self.lr_decay_rate)
# Print model architecture
print('\033[1;31mThe model architecture is shown below:\033[0m')
print(model)
print('\n')
# Print model parameters
print('\033[1;31mThe model\'s parameters are shown below:\033[0m')
for name, value in model.named_parameters():
print("Name: \033[1;31m{0}\033[0m, "
"Parameter Size: \033[1;36m{1}\033[0m, "
"Gradient: \033[1;35m{2}\033[0m".format(
name, value.size(), value.requires_grad))
print('\n')
for epoch in range(1, self.epochs + 1):
index = 0
for batch in self.train_manager.get_batch():
index += 1
# Clear gradients before training
self.model.zero_grad()
# Read sentences and tags from the batch data
sentences, tags, length = zip(*batch)
sentences_tensor = torch.tensor(sentences,
dtype=torch.long,
device=device)
tags_tensor = torch.tensor(tags,
dtype=torch.float,
device=device)
length_tensor = torch.tensor(length,
dtype=torch.int64,
device=device)
# Use Negative Log-Likelihood (NLL) as Loss Function, Run the forward pass
batch_loss = self.model.neg_log_likelihood(
sentences_tensor, tags_tensor, length_tensor)
loss = batch_loss.mean()
progress = ("█" * int(index * 40 / self.total_size)).ljust(40)
print("epoch [{}] |{}| {}/{}\n\t Training Loss {:.6f}".format(
epoch, progress, index, self.total_size, loss))
loss.backward()
optimizer.step()
# Save the model during training
torch.save(self.model.state_dict(),
self.model_path + 'params.pkl')
self.evaluate()
# scheduler.step()
def evaluate(self):
"""
Evaluation of the performance using the dev batch - dev dataset
"""
sentences, labels, length = zip(*self.dev_batch.__next__())
_, pre = self.model(sentences=sentences,
real_length=length,
lengths=None)
sentences_tensor = torch.tensor(sentences,
dtype=torch.long,
device=device)
tags_tensor = torch.tensor(pre, dtype=torch.float, device=device)
length_tensor = torch.tensor(length, dtype=torch.int64, device=device)
loss = self.model.neg_log_likelihood(sentences_tensor, tags_tensor,
length_tensor)
print("\t Evaluation Loss {:.6f}".format(loss.tolist()[0]))
####################################################################################################################################
print('Start to evaluate on the dev set: ')
# Tag-level F1 score summary (w.r.t. each tag)
tag_f1_total = []
for tag in self.tags:
_, _, f1_tag = tag_f1(tar_path=labels,
pre_path=pre,
tag=tag,
tag_map=self.model.tag_map)
tag_f1_total.append(f1_tag)
tag_macro_f1 = sum(tag_f1_total) / len(tag_f1_total)
print(
'Tag-level Macro-averaged F1 Score of the dev set is \033[1;31m%s\033[0m'
% tag_macro_f1)
# Tag-level Micro-averaged F1 Score
_, _, f1_Micro_tag = tag_micro_f1(tar_path=labels,
pre_path=pre,
tags=self.tags,
tag_map=self.model.tag_map)
print(
'Tag-level Micro-averaged F1 Score of the dev set is \033[1;35m%s\033[0m'
% f1_Micro_tag)
####################################################################################################################################
# Tag-level with Label-level F1 score summary
f1_prefix_total = []
prefixes = ['B', 'I', 'E', 'S']
for tag in self.tags:
for prefix in prefixes:
_, _, f1_prefix = entity_label_f1(tar_path=labels,
pre_path=pre,
length=length,
tag=tag,
tag_map=self.model.tag_map,
prefix=prefix)
f1_prefix_total.append(f1_prefix)
f1_macro_tag_prefix = sum(f1_prefix_total) / len(f1_prefix_total)
print(
'Tag-Label-level Macro-averaged F1 Score of the dev set is \033[1;31m%s\033[0m'
% f1_macro_tag_prefix)
####################################################################################################################################
# Label-level F1 score summary
f1_prefix_total = []
prefixes = ['B', 'I', 'E', 'S', 'O']
for prefix in prefixes:
_, _, f1_prefix = label_f1(tar_path=labels,
pre_path=pre,
length=length,
tags=self.tags,
tag_map=self.model.tag_map,
prefix=prefix)
f1_prefix_total.append(f1_prefix)
f1_macro_prefix = sum(f1_prefix_total) / len(f1_prefix_total)
print(
'Label-level Macro-averaged F1 Score of the dev set is \033[1;31m%s\033[0m'
% f1_macro_prefix)
def predict(self):
"""
Prediction & Inference Stage
:param input_str: Input Chinese sentence
:return entities: Predicted entities
"""
# Print model architecture
print('\033[1;31mThe model architecture is shown below:\033[0m')
print(self.model)
print('\n')
# Input one Chinese Sentence
while True:
input_str = input("Please input a sentence in Chinese: ")
if len(input_str) != 0:
# Full-width to half-width
input_str = strQ2B(input_str)
input_str = re.sub(pattern='。', repl='.', string=input_str)
text = cut_text(text=input_str, length=self.max_length)
cut_out = []
for cuttext in text:
# Get the embedding vector (Input Vector) from vocab
input_vec = [self.vocab.get(i, 0) for i in cuttext]
# convert it to tensor and run the model
sentences = torch.tensor(input_vec).view(1, -1)
length = np.expand_dims(np.shape(sentences)[1], axis=0)
length = torch.tensor(length,
dtype=torch.int64,
device=device)
_, paths = self.model(sentences=sentences,
real_length=length,
lengths=None)
# Get the entities from the model
entities = []
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, cuttext, tag)
# Get all the entities
all_start = []
for entity in entities:
start = entity.get('start')
all_start.append([start, entity])
# Sort the results by the "start" index
sort_d = [
value for index, value in sorted(
enumerate(all_start),
key=lambda all_start: all_start[1])
]
if len(sort_d) == 0:
return print("There was no entity in this sentence!!")
else:
sort_d = np.reshape(
np.array(sort_d)[:, 1], [np.shape(sort_d)[0], 1])
cut_out.append(sort_d)
# return cut_out
print(cut_out)
else:
return print('Invalid input! Please re-input!!\n')
class ChineseNER(object):
def __init__(self, entry="train"):
self.load_config()
self.__init_model(entry)
def __init_model(self, entry):
if entry == "train":
self.train_manager = DataManager(batch_size=self.batch_size,
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
self.save_params(data)
dev_manager = DataManager(batch_size=30, data_type="dev")
self.dev_batch = dev_manager.iteration()
self.model = BiLSTMCRF(tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
use_gpu=self.use_gpu)
if self.use_gpu:
print('True')
self.model = self.model.cuda()
else:
print('False')
self.restore_model()
# elif entry=='testXXX':
# self.dev_manager= DataManager(batch_size=30, data_type="test")
# # self.dev_batch = dev_manager.batch_data
# print('####batch_data###',len(dev_manager.batch_data))
elif entry == 'test':
self.dev_manager = DataManager(batch_size=30, data_type="test")
# self.dev_batch = dev_manager.iteration()
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
use_gpu=self.use_gpu)
if self.use_gpu:
print('True')
self.model = self.model.cuda()
else:
print('False')
self.restore_model()
elif entry == "predict":
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
use_gpu=self.use_gpu)
if self.use_gpu:
self.model = self.model.cuda()
self.restore_model()
def load_config(self):
try:
fopen = open("models/config.yml")
config = yaml.load(fopen)
fopen.close()
except Exception as error:
print("Load config failed, using default config {}".format(error))
fopen = open("models/config.yml", "w")
config = {
"embedding_size": 100,
"hidden_size": 128,
"batch_size": 20,
"dropout": 0.5,
"model_path": "models/",
"tags": ["component", "disease&symptom", "people"], #在这里修改tag
"use_gpu": True
}
yaml.dump(config, fopen)
fopen.close()
self.embedding_size = config.get("embedding_size")
self.hidden_size = config.get("hidden_size")
self.batch_size = config.get("batch_size")
self.model_path = config.get("model_path")
self.tags = config.get("tags")
self.dropout = config.get("dropout")
self.use_gpu = config.get("use_gpu")
def restore_model(self):
try:
self.model.load_state_dict(
torch.load(self.model_path + "params.pkl"))
print("model restore success!")
except Exception as error:
print("model restore faild! {}".format(error))
def save_params(self, data):
with open("models/data.pkl", "wb") as fopen:
pickle.dump(data, fopen)
def load_params(self):
with open("models/data.pkl", "rb") as fopen:
data_map = pickle.load(fopen)
return data_map
def train(self):
optimizer = optim.Adam(self.model.parameters())
# optimizer = optim.SGD(ner_model.parameters(), lr=0.01)
for epoch in range(100):
index = 0
for batch in self.train_manager.get_batch():
index += 1
self.model.zero_grad()
print('batch', type(batch), len(batch), len(batch[0]),
len(batch[10]))
sentences, tags, length = zip(*batch)
# print('zip batch sentences', type(sentences), sentences)
# print('zip batch tags', type(tags), tags)
# print('zip batch length', type(length), length)
sentences_tensor = torch.tensor(sentences, dtype=torch.long)
tags_tensor = torch.tensor(tags, dtype=torch.long)
length_tensor = torch.tensor(
length, dtype=torch.long) #在一个batch中，每个句子的原长度
if self.use_gpu:
sentences_tensor = sentences_tensor.cuda()
tags_tensor = tags_tensor.cuda()
length_tensor = length_tensor.cuda()
# print('zip batch sentences', type(sentences_tensor), sentences_tensor.shape)
# print('zip batch tags', type(tags_tensor), tags_tensor.shape)
# print('zip batch length', type(length_tensor), length_tensor.shape,length)
loss = self.model.neg_log_likelihood(sentences_tensor,
tags_tensor,
length_tensor)
progress = ("█" * int(index * 25 / self.total_size)).ljust(25)
print("""epoch [{}] |{}| {}/{}\n\tloss {:.2f}""".format(
epoch, progress, index, self.total_size,
loss.cpu().tolist()[0]))
if index % 10 == 0:
self.evaluate()
print("-" * 50)
loss.backward()
optimizer.step()
torch.save(self.model.state_dict(),
self.model_path + 'params.pkl')
def evaluate(self):
with torch.no_grad():
sentences, labels, length = zip(*self.dev_batch.__next__())
_, paths = self.model(sentences)
print("\teval")
for tag in self.tags:
f1_score(labels, paths, tag, self.model.tag_map)
def predict(self, path): #, input_str=""):
# if not input_str:
# input_str = input("请输入文本: ")
sentences = []
with open('./data/' + path + '.txt', 'r', encoding='utf-8') as f:
for i in f:
sentences += i.strip().split('。')
f = open('./result/tag_' + path + '.json', 'w')
for input_str in sentences:
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
sentences = torch.tensor(input_vec).view(1, -1)
_, paths = self.model(sentences)
entities = []
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, input_str, tag)
dic = {'sentense': input_str, 'entities': entities}
json.dump(dic, f, ensure_ascii=False)
f.close()
# return entities
# def testXXX(self):
# for batch in self.dev_manager.get_batch():
# print(_)
# print(_,len(items),len(items[0][0]),len(items[0][1]),items[0][2])
# break
def test(self):
with torch.no_grad():
id2vocab = {self.vocab[i]: i for i in self.vocab}
print(len(id2vocab))
f = open('./result/test_tag.json', 'w')
total_matrix = np.zeros(
[len(self.tags), 3]
) #横坐标分别表示component,disease&symptom,people;纵坐标分别表示recall, precision, f1
count = 0
for batch in self.dev_manager.get_batch():
count += 1
print(count)
# print(type(items))
sentences, labels, length = zip(*batch)
# sentences, labels, length = zip(*self.dev_batch.__next__())
# print('I am in')
strs = [[id2vocab[w] for w in s] for s in sentences]
# print(strs)
# print(len(sentences),len(sentences[0]),len(sentences[5]))
_, paths = self.model(sentences)
# print("\teval")
# print('path',len(paths),len(paths[0]),len(paths[1]))
for i in range(len(self.tags)):
recall, precision, f1 = f1_score(labels, paths,
self.tags[i],
self.model.tag_map)
total_matrix[i][0] += recall
total_matrix[i][1] += precision
total_matrix[i][2] += f1
entities = []
for i in range(len(paths)):
tmp = []
for tag in self.tags:
tags = get_tags(paths[i], tag, self.tag_map)
tmp += format_result(tags, strs[i], tag)
entities.append(tmp)
# print(entities)
for i in range(len(entities)):
dic = {
'sentense': ''.join(strs[i]),
'entities': entities[i]
}
json.dump(dic, f, ensure_ascii=False)
# f.write(''.join(strs[i])+'#####找到的实体为#####'+'&'.join(entities[i])+'\n')
total_matrix /= count
# print(total_matrix)
for i in range(len(self.tags)):
print(
"{}\tcount\t{}\trecall {:.2f}\tprecision {:.2f}\tf1 {:.2f}"
.format(count, self.tags[i], total_matrix[i][0],
total_matrix[i][1], total_matrix[i][2]))
f.close()
class ChineseNER(object):
def __init__(self, entry="train"):
self.load_config()
self.__init_model(entry)
def __init_model(self, entry):
if entry == "train":
self.train_manager = DataManager(batch_size=self.batch_size,
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
self.save_params(data)
dev_manager = DataManager(batch_size=30, data_type="dev")
self.dev_batch = dev_manager.iteration()
self.model = BiLSTMCRF(
tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
)
self.restore_model()
elif entry == "predict":
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size)
self.restore_model()
def load_config(self):
try:
fopen = open("models/config.yml")
config = yaml.load(fopen, Loader=yaml.FullLoader)
fopen.close()
except Exception as error:
print("Load config failed, using default config {}".format(error))
fopen = open("models/config.yml", "w", encoding='UTF-8')
config = {
"embedding_size": 100,
"hidden_size": 128,
"batch_size": 20,
"dropout": 0.5,
"model_path": "models/",
"tasg": ["ORG", "PER"]
}
yaml.dump(config, fopen)
fopen.close()
self.embedding_size = config.get("embedding_size")
self.hidden_size = config.get("hidden_size")
self.batch_size = config.get("batch_size")
self.model_path = config.get("model_path")
self.tags = config.get("tags")
self.dropout = config.get("dropout")
def restore_model(self):
try:
self.model.load_state_dict(
torch.load(self.model_path + "params.pkl"))
print("model restore success!")
except Exception as error:
print("model restore faild! {}".format(error))
def save_params(self, data):
with open("models/data.pkl", "wb") as fopen:
pickle.dump(data, fopen)
def load_params(self):
with open("models/data.pkl", "rb") as fopen:
data_map = pickle.load(fopen)
return data_map
def train(self):
optimizer = optim.Adam(self.model.parameters())
# optimizer = optim.SGD(ner_model.parameters(), lr=0.01)
for epoch in range(100):
index = 0
for batch in self.train_manager.get_batch():
index += 1
self.model.zero_grad()
sentences, tags, length = zip(*batch)
sentences_tensor = torch.tensor(sentences, dtype=torch.long)
tags_tensor = torch.tensor(tags, dtype=torch.long)
length_tensor = torch.tensor(length, dtype=torch.long)
loss = self.model.neg_log_likelihood(sentences_tensor,
tags_tensor,
length_tensor)
progress = ("█" * int(index * 25 / self.total_size)).ljust(25)
print("""epoch [{}] |{}| {}/{}\n\tloss {:.2f}""".format(
epoch, progress, index, self.total_size,
loss.cpu().tolist()[0]))
self.evaluate()
print("-" * 50)
loss.backward()
optimizer.step()
torch.save(self.model.state_dict(),
self.model_path + 'params.pkl')
def evaluate(self):
sentences, labels, length = zip(*self.dev_batch.__next__())
_, paths = self.model(sentences)
print("\teval")
for tag in self.tags:
f1_score(labels, paths, tag, self.model.tag_map)
def predict(self, input_str=""):
if not input_str:
input_str = input("请输入文本: ")
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
sentences = torch.tensor(input_vec).view(1, -1)
_, paths = self.model(sentences)
entities = []
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, input_str, tag)
return entities
class ChineseNER:
def __init__(self, entry="train"):
# Load Hyper-parameters
config = load_config()
self.model_path = config.get("model_path")
self.epochs = config.get("epochs")
self.batch_size = config.get("batch_size")
self.learning_rate = config.get("learning_rate")
self.weight_decay = config.get("weight_decay")
self.dropout = config.get("dropout")
self.hidden_size = config.get("hidden_size")
self.char_num = config.get("char_num")
self.char_dim = config.get("char_dim")
self.word_dim = config.get("word_dim")
self.word_num = config.get("word_num")
self.tags = config.get("tags")
self.transfer_learning = config.get("transfer_learning")
self.lr_decay_step = config.get("lr_decay_step")
self.lr_decay_rate = config.get("lr_decay_rate")
# Load main model
self.main_model(entry)
def main_model(self, entry):
# The Training Process
if entry == "train":
# Training Process: read Training Data from DataManager
self.train_manager = DataManager(batch_size=self.batch_size,
data_type='train',
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
# Load some model parameters
try:
load_params(path=self.model_path)
print("Successfully load the data.pkl!!!")
except Exception as error:
print("There was no data.pkl!! Start to save........")
# Read the corresponding character index (vocab) and other hyper-parameters
saved_data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"char_vocab": self.train_manager.char_vocab,
"tag_map": self.train_manager.tag_map,
}
save_params(data=saved_data, path=self.model_path)
# Build BiLSTM-CRF Model
self.model = BiLSTMCRF(
tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.char_vocab),
dropout=self.dropout,
word_num=self.word_num,
word_dim=self.word_dim,
char_num=self.char_num,
char_dim=self.char_dim,
hidden_dim=self.hidden_size,
)
# Restore model if it exists
self.restore_model()
# Evaluation Process: read Dev Data from DataManager
self.dev_size = DataManager(batch_size=1,
data_type="dev",
tags=self.tags).load_char_data()
self.dev_manager = DataManager(batch_size=int(self.dev_size),
data_type="dev")
self.dev_batch = self.dev_manager.iteration()
# The Inference Process
elif entry == "predict":
data = load_params(path=self.model_path)
input_size = data.get("input_size")
self.tag_map = data.get("tag_map")
self.vocab = data.get("char_vocab")
self.model = BiLSTMCRF(
tag_map=self.tag_map,
vocab_size=input_size,
dropout=0.0,
word_num=self.word_num,
word_dim=self.word_dim,
char_num=self.char_num,
char_dim=self.char_dim,
hidden_dim=self.hidden_size,
)
self.restore_model()
def train(self):
# Transfer Learning Module
if self.transfer_learning == True:
keep_grad = [
"transitions", "char_embedding.weight",
"char_linear_lstm.weight", "char_linear_lstm.bias",
"word_linear_lstm.weight", "word_linear_lstm.bias",
"hidden2tag.weight", "hidden2tag.bias"
]
for name, value in self.model.named_parameters():
if name in keep_grad:
value.requires_grad = True
else:
value.requires_grad = False
else:
for name, value in self.model.named_parameters():
value.requires_grad = True
# Use Adam Optimizer
optimizer = optim.Adam(params=filter(lambda p: p.requires_grad,
self.model.parameters()),
lr=self.learning_rate,
weight_decay=self.weight_decay)
# Learning Rate Decay
# scheduler = optim.lr_scheduler.StepLR(optimizer=optimizer, step_size=self.lr_decay_step, gamma=self.lr_decay_rate)
# Print model architecture
print('\033[1;31mThe model architecture is shown below:\033[0m')
print(self.model)
print('\n')
# Print model parameters
print('\033[1;31mThe model\'s parameters are shown below:\033[0m')
for name, value in self.model.named_parameters():
print("Name: \033[1;31m{0}\033[0m, "
"Parameter Size: \033[1;36m{1}\033[0m, "
"Gradient: \033[1;35m{2}\033[0m".format(
name, value.size(), value.requires_grad))
print('\n')
for epoch in range(1, self.epochs + 1):
index = 0
for batch in self.train_manager.get_batch():
index += 1
# Clear gradients before training
self.model.zero_grad()
####################################################################################################################################
# Read sentences and labels from the batch data
chars, labels, words, len_word, len_char = zip(*batch)
chars_tensor = torch.tensor(chars,
dtype=torch.long,
device=device)
labels_tensor = torch.tensor(labels,
dtype=torch.float,
device=device)
words_tensor = torch.tensor(words,
dtype=torch.float,
device=device)
len_word_tensor = torch.tensor(len_word,
dtype=torch.int64,
device=device)
len_char_tensor = torch.tensor(len_char,
dtype=torch.int64,
device=device)
####################################################################################################################################
loss = self.model.neg_log_likelihood(characters=chars_tensor,
tags=labels_tensor,
len_char=len_char_tensor,
words=words_tensor,
len_word=len_word_tensor)
progress = ("█" * int(index * 40 / self.total_size)).ljust(40)
print("epoch [{}] |{}| {}/{}\t Batch Loss {:.6f}".format(
epoch, progress, index, self.total_size,
loss.tolist()[0]))
####################################################################################################################################
loss.backward()
optimizer.step()
torch.save(self.model.state_dict(),
self.model_path + 'params.pkl')
self.evaluate()
# scheduler.step()
def evaluate(self):
"""
Evaluation of the performance using the development set
"""
chars, labels, words, len_words, len_chars = zip(
*self.dev_batch.__next__())
chars_tensor = torch.tensor(chars, dtype=torch.long, device=device)
words_tensor = torch.tensor(words, dtype=torch.float, device=device)
len_word_tensor = torch.tensor(len_words,
dtype=torch.int64,
device=device)
len_char_tensor = torch.tensor(len_chars,
dtype=torch.int64,
device=device)
# Run the Forward pass of the model
_, pre = self.model(characters=chars_tensor,
len_char=len_char_tensor,
words=words_tensor,
len_word=len_word_tensor)
tags_tensor = torch.tensor(pre, dtype=torch.int, device=device)
####################################################################################################################################
# Loss on the dev set
loss = self.model.neg_log_likelihood(characters=chars_tensor,
tags=tags_tensor,
len_char=len_char_tensor,
words=words_tensor,
len_word=len_word_tensor)
print("\t Evaluation Loss on the dev set{:.6f}".format(
loss.tolist()[0]))
####################################################################################################################################
print('Start to evaluate on the dev set: ')
####################################################################################################################################
# Tag-level F1 score summary (w.r.t. each tag)
tag_f1_total = []
for tag in self.tags:
_, _, f1_tag = tag_f1(tar_path=labels,
pre_path=pre,
tag=tag,
tag_map=self.model.tag_map)
tag_f1_total.append(f1_tag)
tag_macro_f1 = sum(tag_f1_total) / len(tag_f1_total)
print(
'Tag-level Macro-averaged F1 Score of the dev set is \033[1;31m%s\033[0m'
% tag_macro_f1)
# Tag-level Micro-averaged F1 Score
_, _, f1_Micro_tag = tag_micro_f1(tar_path=labels,
pre_path=pre,
tags=self.tags,
tag_map=self.model.tag_map)
print(
'Tag-level Micro-averaged F1 Score of the dev set is \033[1;35m%s\033[0m'
% f1_Micro_tag)
####################################################################################################################################
# Tag-level with Label-level F1 score summary
f1_prefix_total = []
prefixes = ['B', 'I', 'E', 'S']
for tag in self.tags:
for prefix in prefixes:
_, _, f1_prefix = entity_label_f1(tar_path=labels,
pre_path=pre,
length=len_chars,
tag=tag,
tag_map=self.model.tag_map,
prefix=prefix)
f1_prefix_total.append(f1_prefix)
f1_macro_tag_prefix = sum(f1_prefix_total) / len(f1_prefix_total)
print(
'Tag-Label-level Macro-averaged F1 Score of the dev set is \033[1;31m%s\033[0m'
% f1_macro_tag_prefix)
####################################################################################################################################
# Label-level F1 score summary
f1_prefix_total = []
prefixes = ['B', 'I', 'E', 'S', 'O']
for prefix in prefixes:
_, _, f1_prefix = label_f1(tar_path=labels,
pre_path=pre,
length=len_chars,
tags=self.tags,
tag_map=self.model.tag_map,
prefix=prefix)
f1_prefix_total.append(f1_prefix)
f1_macro_prefix = sum(f1_prefix_total) / len(f1_prefix_total)
print(
'Label-level Macro-averaged F1 Score of the dev set is \033[1;31m%s\033[0m'
% f1_macro_prefix)
def predict(self):
"""
Prediction & Inference Stage
"""
# Load word vectors
pre_trained = self.load_word_vector()
while True:
input_str = input("Please input a sentence in Chinese: ")
input_str = stringQ2B(input_str)
# Get character embedding
char_vec = [self.vocab.get(i, 0) for i in input_str]
char_tensor = np.reshape(char_vec, [-1]).tolist()
len_char = np.expand_dims(len(char_tensor), axis=0)
len_char = torch.tensor(len_char, dtype=torch.int64, device=device)
char_tensor = np.array(self.pad_char_data(char_tensor)).tolist()
char_tensor = torch.tensor(char_tensor,
dtype=torch.long,
device=device)
# Get word embedding
embed_words = []
words = jieba.lcut(input_str, HMM=True)
for i in words:
vec = pre_trained.get(i)
if str(type(vec)) != "<class 'NoneType'>":
embed_words.append(vec)
else:
gen_vec = np.random.normal(size=self.word_dim).tolist()
embed_words.append(gen_vec)
word_tensor = np.array(self.pad_word_data(embed_words)).tolist()
len_word = np.expand_dims(len(word_tensor), axis=0)
len_word = torch.tensor(len_word, dtype=torch.int64, device=device)
word_tensor = torch.tensor(word_tensor,
dtype=torch.float,
device=device)
# Run the model and get all the predicted entities
_, paths = self.model(characters=char_tensor,
len_char=len_char,
words=word_tensor,
len_word=len_word)
# Format the results
entities = []
for tag in self.tags:
tags = get_tags(path=paths[0], tag=tag, tag_map=self.tag_map)
entities += format_result(result=tags, text=input_str, tag=tag)
print(entities)
def load_word_vector(self):
"""
Load pre-trained word vectors
"""
if 'pre_trained' not in globals().keys():
print("Start to load pre-trained word embeddings!!")
pre_trained = {}
for i, line in enumerate(
codecs.open(self.model_path + "word_vectors.vec",
'r',
encoding='utf-8')):
line = line.rstrip().split()
if len(line) == self.word_dim + 1:
pre_trained[line[0]] = np.array(
[float(x) for x in line[1:]]).astype(np.float32)
else:
pre_trained = globals().get("pre_trained")
return pre_trained
def pad_char_data(self, data: list):
"""
Pad character data
"""
c_data = copy.deepcopy(data)
if np.shape(c_data)[0] < self.char_num:
c_data = c_data + (self.char_num - np.shape(c_data)[0]) * [0]
else:
c_data = c_data[:self.char_num]
c_data = np.expand_dims(c_data, axis=0)
return c_data
def pad_word_data(self, data: list):
"""
Pad word data
"""
c_data = copy.deepcopy(data)
if len(c_data) <= self.word_num:
c_data = c_data + (self.word_num - len(c_data)) * [[0] *
self.word_dim]
else:
c_data = c_data[:self.word_num, :]
c_data = np.reshape(c_data,
[np.shape(c_data)[0] * np.shape(c_data)[1]])
c_data = np.expand_dims(c_data, axis=0)
return c_data
def restore_model(self):
"""
Restore and load the model
"""
try:
self.model.load_state_dict(
torch.load(self.model_path + "params.pkl"))
print("Model Successfully Restored!!")
except Exception as error:
print("Model Failed to restore!!")
class ChineseNER(object):
def __init__(self, entry="train"):
self.load_config()
self.__init_model(entry)
def __init_model(self, entry):
if entry == "train":
self.train_manager = DataManager(batch_size=self.batch_size,
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
self.save_params(data)
dev_manager = DataManager(batch_size=30, data_type="dev")
self.dev_batch = dev_manager.iteration()
self.model = BiLSTMCRF(
tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
)
self.restore_model()
elif entry == "predict":
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size)
self.restore_model()
def parse_argument(self):
"""
:argument
:return:
"""
parser = argparse.ArgumentParser(description="NER")
parser.add_argument("-c",
"--config",
dest="config_file",
type=str,
default="./Config/config.cfg",
help="config path")
parser.add_argument("-device",
"--device",
dest="device",
type=str,
default="cuda:0",
help="device[‘cpu’,‘cuda:0’,‘cuda:1’,......]")
parser.add_argument("--train",
dest="train",
action="store_true",
default=True,
help="train model")
parser.add_argument("-p",
"--process",
dest="process",
action="store_true",
default=True,
help="data process")
parser.add_argument("-t",
"--test",
dest="test",
action="store_true",
default=False,
help="test model")
parser.add_argument("--t_model",
dest="t_model",
type=str,
default=None,
help="model for test")
parser.add_argument("--t_data",
dest="t_data",
type=str,
default=None,
help="data[train, dev, test, None] for test model")
parser.add_argument("--predict",
dest="predict",
action="store_true",
default=False,
help="predict model")
args = parser.parse_args()
# print(vars(args))
config = configurable.Configurable(config_file=args.config_file)
config.device = args.device
config.train = args.train
config.process = args.process
config.test = args.test
config.t_model = args.t_model
config.t_data = args.t_data
config.predict = args.predict
# config
if config.test is True:
config.train = False
if config.t_data not in [None, "train", "dev", "test"]:
print("\nUsage")
parser.print_help()
print("t_data : {}, not in [None, 'train', 'dev', 'test']".format(
config.t_data))
exit()
print("***************************************")
print("Device : {}".format(config.device))
print("Data Process : {}".format(config.process))
print("Train model : {}".format(config.train))
print("Test model : {}".format(config.test))
print("t_model : {}".format(config.t_model))
print("t_data : {}".format(config.t_data))
print("predict : {}".format(config.predict))
print("***************************************")
return config
def load_config(self):
try:
fopen = open("models/config.yml")
config = yaml.load(fopen)
fopen.close()
except Exception as error:
print("Load config failed, using default config {}".format(error))
fopen = open("models/config.yml", "w")
config = {
"embedding_size": 100,
"hidden_size": 128,
"batch_size": 20,
"dropout": 0.5,
"model_path": "models/",
"tasg": ["ORG", "PER"]
}
yaml.dump(config, fopen)
fopen.close()
self.embedding_size = config.get("embedding_size")
self.hidden_size = config.get("hidden_size")
self.batch_size = config.get("batch_size")
self.model_path = config.get("model_path")
self.tags = config.get("tags")
self.dropout = config.get("dropout")
def restore_model(self):
try:
self.model.load_state_dict(
torch.load(self.model_path + "params.pkl"))
print("model restore success!")
except Exception as error:
print("model restore faild! {}".format(error))
def save_params(self, data):
with open("models/data.pkl", "wb") as fopen:
pickle.dump(data, fopen)
def load_params(self):
with open("models/data.pkl", "rb") as fopen:
data_map = pickle.load(fopen)
return data_map
def train(self):
optimizer = optim.Adam(self.model.parameters())
# optimizer = optim.SGD(ner_model.parameters(), lr=0.01)
for epoch in range(100):
index = 0
for batch in self.train_manager.get_batch():
index += 1
self.model.zero_grad()
sentences, tags, length = zip(*batch)
sentences_tensor = torch.tensor(sentences, dtype=torch.long)
tags_tensor = torch.tensor(tags, dtype=torch.long)
length_tensor = torch.tensor(length, dtype=torch.long)
loss = self.model.neg_log_likelihood(sentences_tensor,
tags_tensor,
length_tensor)
progress = ("█" * int(index * 25 / self.total_size)).ljust(25)
print("""epoch [{}] |{}| {}/{}\n\tloss {:.2f}""".format(
epoch, progress, index, self.total_size,
loss.cpu().tolist()[0]))
self.evaluate()
print("-" * 50)
loss.backward()
optimizer.step()
torch.save(self.model.state_dict(),
self.model_path + 'params.pkl')
def evaluate(self):
sentences, labels, length = zip(*self.dev_batch.__next__())
_, paths = self.model(sentences)
print("\teval")
for tag in self.tags:
f1_score(labels, paths, tag, self.model.tag_map)
def predict(self, input_str=""):
if not input_str:
input_str = input("请输入文本: ")
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
sentences = torch.tensor(input_vec).view(1, -1)
_, paths = self.model(sentences)
entities = []
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, input_str, tag)
return entities
class ChineseNER(object):
def __init__(self, entry="train"):
self.load_config()
self.__init_model(entry)
def __init_model(self, entry):
if entry == "train":
self.train_manager = DataManager(batch_size=self.batch_size,
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
self.save_params(data)
self.dev_manager = DataManager(batch_size=60, data_type="dev")
# 验证集
# self.dev_batch = self.dev_manager.iteration()
self.model = BiLSTMCRF(
tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
)
self.model = self.model.cuda()
self.restore_model()
elif entry == "predict" or "evaluate":
# python main.py predict
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
print('input_size', input_size)
print('tag_map', self.tag_map)
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size)
self.model = self.model.cuda()
self.test_manager = DataManager(batch_size=60, data_type="dev")
self.restore_model()
# 加载配置项
def load_config(self):
try:
fopen = open("models/config.yml")
config = yaml.load(fopen)
fopen.close()
except Exception as error:
print("Load config failed, using default config {}".format(error))
fopen = open("models/config.yml", "w")
config = {
"embedding_size": 300,
"hidden_size": 128,
"batch_size": 30,
"dropout": 0.5,
"model_path": "models/",
"tags": ["TREATMENT", "BODY", "SIGNS", "CHECK", "DISEASE"]
}
yaml.dump(config, fopen)
fopen.close()
self.embedding_size = config.get("embedding_size")
self.hidden_size = config.get("hidden_size")
self.batch_size = config.get("batch_size")
self.model_path = config.get("model_path")
self.tags = config.get("tags")
self.dropout = config.get("dropout")
# 保存模型各种训练参数
def restore_model(self):
try:
self.model.load_state_dict(
torch.load(self.model_path + "params_6all.pkl"))
print("model restore success!")
except Exception as error:
print("model restore faild! {}".format(error))
# 保存模型超参数
def save_params(self, data):
with open("models/data_6all.pkl", "wb") as fopen:
pickle.dump(data, fopen)
# 加载模型超参数
def load_params(self):
with open("models/data_6all.pkl", "rb") as fopen:
data_map = pickle.load(fopen)
return data_map
def train(self):
optimizer = optim.Adam(self.model.parameters(),
weight_decay=0.002,
lr=0.0000004) # 0.000001
# optimizer = optim.SGD(self.model.parameters(), lr=0.00000008,weight_decay=0.001,momentum=0.9) #4e-7
scheduler_lr = optim.lr_scheduler.ReduceLROnPlateau(optimizer,
mode='min',
factor=0.5,
patience=2,
cooldown=5,
verbose=True,
min_lr=1e-8,
eps=1e-8)
best_loss = 240
lossList = [0] * self.total_size
for epoch in range(268, 401):
losses = []
index = 0
startTime = time.process_time()
for batch in self.train_manager.get_batch():
start = time.process_time()
index += 1
self.model.zero_grad()
sentences, tags, length = zip(*batch)
# lenght 是句子的原本长度
# shape (batch_size,max.len(sentence) (20,332) batch_size 和 每个batch最长句子的长度
sentences_tensor = torch.tensor(sentences,
dtype=torch.long).cuda()
tags_tensor = torch.tensor(tags, dtype=torch.long).cuda()
length_tensor = torch.tensor(length, dtype=torch.long).cuda()
loss = self.model.neg_log_likelihood(sentences_tensor,
tags_tensor,
length_tensor)
losses.append(loss.cpu().item())
progress = ("█" * int(index * 60 / self.total_size)).ljust(60)
loss.backward()
optimizer.step()
# torch.save(self.model.state_dict(), self.model_path + 'params_6all.pkl')
end = time.process_time()
dur = end - start
print(
"""epoch [{}] |{}| {}/{}\n\tloss {:.3f}\t\tlast_loss {:.3f}\t\ttime {}\t\tbest_avg_loss {:.3f}"""
.format(epoch, progress, index, self.total_size,
loss.cpu().tolist()[0], lossList[index - 1],
str(dur), best_loss))
lossList[index - 1] = loss.cpu().item()
print("-" * 90)
endTime = time.process_time()
totalTime = endTime - startTime
avg_loss = np.mean(losses)
# 保存最好的模型
if avg_loss < best_loss:
best_loss = avg_loss
torch.save(self.model.state_dict(),
self.model_path + 'params_6all.pkl')
writer.add_scalar('BiLstm_CRF:avg_loss-epoch', avg_loss, epoch)
print('epoch ', epoch, ' avg_loss ', avg_loss, ' total_time ',
totalTime)
if epoch % 5 == 0:
self.evaluate(epoch / 5, manager=self.dev_manager)
print("-" * 100)
scheduler_lr.step(avg_loss)
writer.close()
# train: BODY 7507, SIGNS 6355, CHECK 6965, DISEASE 474, TREATMENT 805
# test:
# 计算f1,评估模型
def evaluate(self, epoch, manager, add_scalar=True):
print('正在开始评估')
all_origins = all_founds = all_rights = 0
for tag in self.tags:
origins = founds = rights = 0
for batch in manager.get_batch():
sentences, labels, length = zip(*batch)
_, paths = self.model(sentences)
origin, found, right = f1_score(labels, paths, tag,
self.model.tag_map)
origins += origin
founds += found
rights += right
all_origins += origins
all_founds += founds
all_rights += rights
recall = 0. if origins == 0 else (rights / origins)
precision = 0. if founds == 0 else (rights / founds)
f1 = 0. if recall + precision == 0 else (
2 * precision * recall) / (precision + recall)
print("\t{}\torigins:{}\t\t\tfounds:{}\t\t\trights:{}".format(
tag, origins, founds, rights))
print("\t\t\trecall:{}\tprecision:{}\tf1:{}".format(
recall, precision, f1))
if add_scalar:
tag_epoch = tag + '-5epoch'
writer.add_scalars(tag_epoch, {
'recall': recall,
'precision': precision,
'f1': f1
}, epoch)
all_recall = 0. if all_origins == 0 else (all_rights / all_origins)
all_precision = 0. if all_founds == 0 else (all_rights / all_founds)
all_f1 = 0. if all_recall + all_precision == 0 else (
2 * all_precision * all_recall) / (all_precision + all_recall)
print("\tall_origins:{}\t\t\tall_founds:{}\t\t\tall_rights:{}".format(
all_origins, all_founds, all_rights))
print("\tall_recall:{}\tall_precision:{}\tall_f1:{}".format(
all_recall, all_precision, all_f1))
if add_scalar:
writer.add_scalars(
"ALL-5epoch", {
'all_recall': all_recall,
'all_precision': all_precision,
'all_f1': all_f1
}, epoch)
print('评估结束')
return all_recall, all_precision, all_f1
# 预测方法
def predict(self, input_str=""):
if not input_str:
input_str = input("请输入文本: ")
# 获取输入句子所有汉字的在vocab的索引
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
sentences = torch.tensor(input_vec, dtype=torch.long).view(1, -1)
sentences = sentences.cuda()
# paths 预测出来的标签索引 shape 为 [1,1]
_, paths = self.model(sentences)
entities = []
# "tags": ["ORG", "PER"]
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, input_str, tag)
print(entities)
print(json.dumps(entities, indent=4, ensure_ascii=False))
return entities
class BiLSTMCRFEnter(object):
def __init__(self, entry="train"):
# 导入训练参数
# 利用配置文件对main函数里面需要的变量进行初始化
self.load_config()
# 这里传入的entry是train，也就是训练集，也就是说对model初始化时是利用训练集对模型初始化的
self.__init_model(entry)
def __init_model(self, entry):
# 模型训练的参数准备
if entry == "train":
#创建训练数据集的管理对象
print(self.tags)
self.train_manager = DataManager(batch_size=self.batch_size, tags=self.tags)
print(self.train_manager.batch_data)
print(len(self.train_manager.batch_data))
self.total_size = len(self.train_manager.batch_data)
# print(self.train_manager.batch_data)
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
# 保存参数
self.save_params(data)
# 验证数据集的准备
# 创建验证数据集的管理对象
dev_manager = DataManager(batch_size=30, data_type="dev")
# 通过data_manager中的迭代器不断将创建的数据管理器对象赋值到dev_batch中,用于下面计算损失的函数
self.dev_batch = dev_manager.iteration()
# 模型的主体使用的是BiLSTM来进行语义编码，CRF用来约束各个标签
self.model = BiLSTMCRF(
tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
)
# 加载恢复模型参数
self.restore_model()
# 模型用来预测的参数准备
elif entry == "predict":
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
# 这里创建一个模型对象model
self.model = BiLSTMCRF(
tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size
)
self.restore_model()
def load_config(self):
try:
fopen = open("models/config.yml")
#读取yml文件
config = yaml.load(fopen)
fopen.close()
except Exception as error:
print("Load config failed, using default config {}".format(error))
#这里是重写config.yml文件
fopen = open("models/config.yml", "w")
config = {
# 用于重写的数据，即初始化数据
"embedding_size": 100,
"hidden_size": 128,
"batch_size": 50,
"dropout": 0.5,
"model_path": "models/",
#这里原来的tags写成了tasg了，需要改过来
"tags": ["Medicinal_Name", "Medicinal_Other_Name", "Medicinal_Function", "Medicinal_Taste", "Medicinal_Use_Num"]
}
yaml.dump(config, fopen)
fopen.close()
#重写过后再读取，感觉有点多此一举，主要就是将tags写进了config文件
# word_embedding的维度大小
self.embedding_size = config.get("embedding_size")
# 隐藏层的维度
self.hidden_size = config.get("hidden_size")
# 每一个batch导入多少条数据
self.batch_size = config.get("batch_size")
# 模型的保存数据
self.model_path = config.get("model_path")
self.tags = config.get("tags")
# 模型中神经百分之多少激活
self.dropout = config.get("dropout")
# 模型一共训练多少轮
self.epoch = config.get("epoch")
# 模型在测试过程中进行参数导入
def restore_model(self):
try:
# 加载模型字典、
# 这个load_state_dict函数并没有出现在任何一个文件中，所以这是怎么调用的？
self.model.load_state_dict(torch.load(self.model_path + "params.pkl"))
print("model restore success!")
except Exception as error:
print("model restore faild! {}".format(error))
# 训练过程中保存模型的参数
def save_params(self, data):
with open("models/data.pkl", "wb") as fopen:
pickle.dump(data, fopen)
# 训练过程中读取更新后的模型的参数
def load_params(self):
# pkl文件的读取
with open("models/data.pkl", "rb") as fopen:
data_map = pickle.load(fopen)
# print("*"*50+data_map+"*"*50)
return data_map
def train(self):
# 使用Adam优化器进行梯度下降算法的优化迭代
# 这里的parameters函数也没有在任何文件中声明过
optimizer = optim.Adam(self.model.parameters(), lr=0.05)
# optimizer = optim.SGD(ner_model.parameters(), lr=0.01)
# 模型一共训练多少轮轮
for epoch in range(self.epoch):
index = 0
# 获取每一个batch的数据
for batch in self.train_manager.get_batch():
index += 1
self.model.zero_grad()
sentences, tags, length = zip(*batch)
sentences_tensor = torch.tensor(sentences, dtype=torch.long)
tags_tensor = torch.tensor(tags, dtype=torch.long)
length_tensor = torch.tensor(length, dtype=torch.long)
# 计算模型训练过程中的损失
loss = self.model.neg_log_likelihood(sentences_tensor, tags_tensor, length_tensor)
# 进度加载
progress = ("█" * int(index * 25 / self.total_size)).ljust(25)
print("""epoch [{}] |{}| {}/{}\n\tloss {:.2f}""".format(
epoch, progress, index, self.total_size, loss.cpu().tolist()[0]
)
)
self.evaluate()
print("-" * 50)
# 梯度回传
loss.backward()
# 优化器优化
optimizer.step()
# 保存模型
torch.save(self.model.state_dict(), self.model_path + 'params.pkl')
# torch.save(self.model)
# 训练过程中的损失计算
def evaluate(self):
sentences, labels, length = zip(*self.dev_batch.__next__())
_, paths = self.model(sentences)
print("\teval")
for tag in self.tags:
f1_score(labels, paths, tag, self.model.tag_map)
# 模型训练好之后的预测
def predict(self, input_str=""):
if not input_str:
input_str = input("请输入文本: ")
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
sentences = torch.tensor(input_vec).view(1, -1)
_, paths = self.model(sentences)
entities = []
for tag in self.tags:
# 这里调用了工具类里面的get_tags用来对数据进行标注，就是标一些B-FUNC什么的
tags = get_tags(paths[0], tag, self.tag_map)
print(tag)
print(self.tag_map)
print(paths[0])
print(tags)
entities += format_result(tags, input_str, tag)
return entities
# 模型对文件中的句子进行实体预测
def predict_file(self, f_r_path, f_w_path):
# 去除重复预测的实体
duplication = set()
with open(f_r_path, encoding='utf-8') as f_r:
with open(f_w_path, 'ab') as f_w:
for line in f_r.readlines():
sent = line.split('\t')[-3].strip()
res = self.predict(sent)
for i in range(len(res)-1):
entity = res[i]['word']
tag=res[i]["type"]
if entity not in duplication:
# print(entity)
duplication.add(tag)
duplication.add(entity)
f_w.write((tag+" ： "+entity + '\n').encode())
if res[i]["type"]!=res[i+1]["type"]:
f_w.write('\n'.encode())
class ChineseNER(object):
use_gpu = False
def __init__(self, entry="train"):
self.load_config()
#self.use_gpu = torch.cuda.is_available()
self.__init_model(entry)
print(self.use_gpu)
if (self.use_gpu): # gpu加速
self.model = self.model.cuda()
def __init_model(self, entry):
if entry == "train":
self.train_manager = DataManager(batch_size=self.batch_size,
tags=self.tags)
self.total_size = len(self.train_manager.batch_data)
data = {
"batch_size": self.train_manager.batch_size,
"input_size": self.train_manager.input_size,
"vocab": self.train_manager.vocab,
"tag_map": self.train_manager.tag_map,
}
self.save_params(data)
dev_manager = DataManager(batch_size=30, data_type="dev")
self.dev_batch = dev_manager.iteration()
self.model = BiLSTMCRF(
tag_map=self.train_manager.tag_map,
batch_size=self.batch_size,
vocab_size=len(self.train_manager.vocab),
dropout=self.dropout,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size,
)
self.restore_model()
elif entry == "predict":
data_map = self.load_params()
input_size = data_map.get("input_size")
self.tag_map = data_map.get("tag_map")
self.vocab = data_map.get("vocab")
self.model = BiLSTMCRF(tag_map=self.tag_map,
vocab_size=input_size,
embedding_dim=self.embedding_size,
hidden_dim=self.hidden_size)
self.restore_model()
def load_config(self):
try:
fopen = open("models/config.yml")
config = yaml.load(fopen)
fopen.close()
except Exception as error:
print("Load config failed, using default config {}".format(error))
fopen = open("models/config.yml", "w")
config = {
"embedding_size": 100,
"hidden_size": 128,
"batch_size": 20,
"dropout": 0.5,
"model_path": "models/",
"tasg": ["ORG", "PER"]
}
yaml.dump(config, fopen)
fopen.close()
self.embedding_size = config.get("embedding_size")
self.hidden_size = config.get("hidden_size")
self.batch_size = config.get("batch_size")
self.model_path = config.get("model_path")
self.tags = config.get("tags")
self.dropout = config.get("dropout")
def restore_model(self):
try:
self.model.load_state_dict(
torch.load(self.model_path + "params.pkl"))
print("model restore success!")
except Exception as error:
print("model restore faild! {}".format(error))
def save_params(self, data):
with open("models/data.pkl", "wb") as fopen:
pickle.dump(data, fopen)
def load_params(self):
with open("models/data.pkl", "rb") as fopen:
data_map = pickle.load(fopen)
return data_map
#@torchsnooper.snoop()
def train(self):
optimizer = optim.Adam(self.model.parameters())
# optimizer = optim.SGD(ner_model.parameters(), lr=0.01)
for epoch in range(100):
index = 0
for batch in self.train_manager.get_batch():
index += 1
self.model.zero_grad()
sentences, tags, length = zip(*batch)
sentences_tensor = torch.tensor(sentences, dtype=torch.long)
tags_tensor = torch.tensor(tags, dtype=torch.long)
length_tensor = torch.tensor(length, dtype=torch.long)
if (self.use_gpu): # gpu加速
sentences_tensor = sentences_tensor.cuda()
tags_tensor = tags_tensor.cuda()
length_tensor = length_tensor.cuda()
loss = self.model.neg_log_likelihood(sentences_tensor,
tags_tensor,
length_tensor)
if (self.use_gpu):
loss = loss.cuda()
progress = ("█" * int(index * 25 / self.total_size)).ljust(25)
print("""epoch [{}] |{}| {}/{}\n\tloss {:.2f}""".format(
epoch, progress, index, self.total_size,
loss.cpu().tolist()[0]))
self.evaluate()
print("-" * 50)
loss.backward()
optimizer.step()
torch.save(self.model.state_dict(),
self.model_path + 'params.pkl')
def get_string(self, x):
now = x.split('\n')
o = now[1].split(' ')
while '' in o:
o.remove('')
return o[1]
def evaluate(self):
sentences, labels, length = zip(*self.dev_batch.__next__())
if (self.use_gpu):
sentences = torch.tensor(sentences, dtype=torch.long).cuda()
_, paths = self.model(sentences)
print("\teval")
for tag in self.tags:
f1_score(labels, paths, tag, self.model.tag_map)
def predict(self, input_str="", input_path=None):
if input_path is not None:
tests = pd.read_csv(input_path)
with open('output.txt', 'w', encoding='utf-8') as o:
#o.write('id,aspect,opinion\n')
for ids in range(1, 2235):
input_str = self.get_string(
str(tests.loc[ids - 1:ids - 1, ['Review']]))
index = int(
self.get_string(str(tests.loc[ids - 1:ids - 1,
['id']])))
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
if (self.use_gpu): # gpu加速
sentences = torch.tensor(input_vec).view(1, -1).cuda()
else:
sentences = torch.tensor(input_vec).view(1, -1)
_, paths = self.model(sentences)
entities = []
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, input_str, tag)
entities = sorted(entities, key=lambda x: x['start'])
#print(str(index) + " " + input_str + " " +str(len(entities)))
for entity in entities:
#print(entity)
o.write(
str(index) + ',' + entity['type'] + ',' +
entity['word'] + '\n')
else:
if not input_str:
input_str = input("请输入文本: ")
input_vec = [self.vocab.get(i, 0) for i in input_str]
# convert to tensor
if (self.use_gpu): # gpu加速
sentences = torch.tensor(input_vec).view(1, -1).cuda()
else:
sentences = torch.tensor(input_vec).view(1, -1)
_, paths = self.model(sentences)
entities = []
for tag in self.tags:
tags = get_tags(paths[0], tag, self.tag_map)
entities += format_result(tags, input_str, tag)
return entities