-
Notifications
You must be signed in to change notification settings - Fork 13
/
train_classifier.py
279 lines (248 loc) · 9.35 KB
/
train_classifier.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
import os
import sys
import argparse
import time
import random
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
import torch.optim as optim
from torch.autograd import Variable
# from sru import *
import dataloader
import modules
class Model(nn.Module):
def __init__(self, embedding, hidden_size=150, depth=1, dropout=0.3, cnn=False, nclasses=2):
super(Model, self).__init__()
self.cnn = cnn
self.drop = nn.Dropout(dropout)
self.emb_layer = modules.EmbeddingLayer(
embs = dataloader.load_embedding(embedding)
)
self.word2id = self.emb_layer.word2id
if cnn:
self.encoder = modules.CNN_Text(
self.emb_layer.n_d,
widths = [3,4,5],
filters=hidden_size
)
d_out = 3*hidden_size
else:
self.encoder = nn.LSTM(
self.emb_layer.n_d,
hidden_size//2,
depth,
dropout = dropout,
# batch_first=True,
bidirectional=True
)
d_out = hidden_size
# else:
# self.encoder = SRU(
# emb_layer.n_d,
# args.d,
# args.depth,
# dropout = args.dropout,
# )
# d_out = args.d
self.out = nn.Linear(d_out, nclasses)
def forward(self, input):
if self.cnn:
input = input.t()
emb = self.emb_layer(input)
emb = self.drop(emb)
if self.cnn:
output = self.encoder(emb)
else:
output, hidden = self.encoder(emb)
# output = output[-1]
output = torch.max(output, dim=0)[0].squeeze()
output = self.drop(output)
return self.out(output)
def text_pred(self, text, batch_size=32):
batches_x = dataloader.create_batches_x(
text,
batch_size, ##TODO
self.word2id
)
outs = []
with torch.no_grad():
for x in batches_x:
x = Variable(x)
if self.cnn:
x = x.t()
emb = self.emb_layer(x)
if self.cnn:
output = self.encoder(emb)
else:
output, hidden = self.encoder(emb)
# output = output[-1]
output = torch.max(output, dim=0)[0]
outs.append(F.softmax(self.out(output), dim=-1))
return torch.cat(outs, dim=0)
def eval_model(niter, model, input_x, input_y):
model.eval()
# N = len(valid_x)
# criterion = nn.CrossEntropyLoss()
correct = 0.0
cnt = 0.
# total_loss = 0.0
with torch.no_grad():
for x, y in zip(input_x, input_y):
x, y = Variable(x, volatile=True), Variable(y)
output = model(x)
# loss = criterion(output, y)
# total_loss += loss.item()*x.size(1)
pred = output.data.max(1)[1]
correct += pred.eq(y.data).cpu().sum()
cnt += y.numel()
model.train()
return correct.item()/cnt
def train_model(epoch, model, optimizer,
train_x, train_y,
test_x, test_y,
best_test, save_path):
model.train()
niter = epoch*len(train_x)
criterion = nn.CrossEntropyLoss()
cnt = 0
for x, y in zip(train_x, train_y):
niter += 1
cnt += 1
model.zero_grad()
x, y = Variable(x), Variable(y)
output = model(x)
loss = criterion(output, y)
loss.backward()
optimizer.step()
test_acc = eval_model(niter, model, test_x, test_y)
sys.stdout.write("Epoch={} iter={} lr={:.6f} train_loss={:.6f} test_err={:.6f}\n".format(
epoch, niter,
optimizer.param_groups[0]['lr'],
loss.item(),
test_acc
))
if test_acc > best_test:
best_test = test_acc
if save_path:
torch.save(model.state_dict(), save_path)
# test_err = eval_model(niter, model, test_x, test_y)
sys.stdout.write("\n")
return best_test
def save_data(data, labels, path, type='train'):
with open(os.path.join(path, type+'.txt'), 'w') as ofile:
for text, label in zip(data, labels):
ofile.write('{} {}\n'.format(label, ' '.join(text)))
def main(args):
if args.dataset == 'mr':
# data, label = dataloader.read_MR(args.path)
# train_x, train_y, test_x, test_y = dataloader.cv_split2(
# data, label,
# nfold=10,
# valid_id=args.cv
# )
#
# if args.save_data_split:
# save_data(train_x, train_y, args.path, 'train')
# save_data(test_x, test_y, args.path, 'test')
train_x, train_y = dataloader.read_corpus('/data/datasets/mr/train.txt')
test_x, test_y = dataloader.read_corpus('/data/datasets/mr/test.txt')
elif args.dataset == 'imdb':
train_x, train_y = dataloader.read_corpus(os.path.join('/data/nlp/datasets/imdb',
'train_tok.csv'),
clean=False, MR=True, shuffle=True)
test_x, test_y = dataloader.read_corpus(os.path.join('/data/nlp/datasets/imdb',
'test_tok.csv'),
clean=False, MR=True, shuffle=True)
else:
train_x, train_y = dataloader.read_corpus('proj/to_di/data/{}/'
'train_tok.csv'.format(args.dataset),
clean=False, MR=False, shuffle=True)
test_x, test_y = dataloader.read_corpus('proj/to_di/data/{}/'
'test_tok.csv'.format(args.dataset),
clean=False, MR=False, shuffle=True)
nclasses = max(train_y) + 1
# elif args.dataset == 'subj':
# data, label = dataloader.read_SUBJ(args.path)
# elif args.dataset == 'cr':
# data, label = dataloader.read_CR(args.path)
# elif args.dataset == 'mpqa':
# data, label = dataloader.read_MPQA(args.path)
# elif args.dataset == 'trec':
# train_x, train_y, test_x, test_y = dataloader.read_TREC(args.path)
# data = train_x + test_x
# label = None
# elif args.dataset == 'sst':
# train_x, train_y, valid_x, valid_y, test_x, test_y = dataloader.read_SST(args.path)
# data = train_x + valid_x + test_x
# label = None
# else:
# raise Exception("unknown dataset: {}".format(args.dataset))
# if args.dataset == 'trec':
# elif args.dataset != 'sst':
# train_x, train_y, valid_x, valid_y, test_x, test_y = dataloader.cv_split(
# data, label,
# nfold = 10,
# test_id = args.cv
# )
model = Model(args.embedding, args.d, args.depth, args.dropout, args.cnn, nclasses).cuda()
need_grad = lambda x: x.requires_grad
optimizer = optim.Adam(
filter(need_grad, model.parameters()),
lr = args.lr
)
train_x, train_y = dataloader.create_batches(
train_x, train_y,
args.batch_size,
model.word2id,
)
# valid_x, valid_y = dataloader.create_batches(
# valid_x, valid_y,
# args.batch_size,
# emb_layer.word2id,
# )
test_x, test_y = dataloader.create_batches(
test_x, test_y,
args.batch_size,
model.word2id,
)
best_test = 0
# test_err = 1e+8
for epoch in range(args.max_epoch):
best_test = train_model(epoch, model, optimizer,
train_x, train_y,
# valid_x, valid_y,
test_x, test_y,
best_test, args.save_path
)
if args.lr_decay>0:
optimizer.param_groups[0]['lr'] *= args.lr_decay
# sys.stdout.write("best_valid: {:.6f}\n".format(
# best_valid
# ))
sys.stdout.write("test_err: {:.6f}\n".format(
best_test
))
if __name__ == "__main__":
argparser = argparse.ArgumentParser(sys.argv[0], conflict_handler='resolve')
argparser.add_argument("--cnn", action='store_true', help="whether to use cnn")
argparser.add_argument("--lstm", action='store_true', help="whether to use lstm")
argparser.add_argument("--dataset", type=str, default="mr", help="which dataset")
argparser.add_argument("--embedding", type=str, required=True, help="word vectors")
argparser.add_argument("--batch_size", "--batch", type=int, default=32)
argparser.add_argument("--max_epoch", type=int, default=70)
argparser.add_argument("--d", type=int, default=150)
argparser.add_argument("--dropout", type=float, default=0.3)
argparser.add_argument("--depth", type=int, default=1)
argparser.add_argument("--lr", type=float, default=0.001)
argparser.add_argument("--lr_decay", type=float, default=0)
argparser.add_argument("--cv", type=int, default=0)
argparser.add_argument("--save_path", type=str, default='')
argparser.add_argument("--save_data_split", action='store_true', help="whether to save train/test split")
argparser.add_argument("--gpu_id", type=int, default=0)
args = argparser.parse_args()
# args.save_path = os.path.join(args.save_path, args.dataset)
print (args)
torch.cuda.set_device(args.gpu_id)
main(args)