from torchnlp.text_encoders import WhitespaceEncoder, IdentityEncoder
from torchnlp import word_to_vector
from model import SNLIClassifier
from util import get_args, makedirs, collate_fn
args = get_args()
if args.gpu >= 0:
torch.cuda.set_device(args.gpu)
# load dataset
train, dev, test = snli_dataset(train=True, dev=True, test=True)
# Preprocess
for row in datasets_iterator(train, dev, test):
row['premise'] = row['premise'].lower()
row['hypothesis'] = row['hypothesis'].lower()
# Make Encoders
sentence_corpus = [row['premise'] for row in datasets_iterator(train, dev, test)]
sentence_corpus += [row['hypothesis'] for row in datasets_iterator(train, dev, test)]
sentence_encoder = WhitespaceEncoder(sentence_corpus)
label_corpus = [row['label'] for row in datasets_iterator(train, dev, test)]
label_encoder = IdentityEncoder(label_corpus)
# Encode
for row in datasets_iterator(train, dev, test):
row['premise'] = sentence_encoder.encode(row['premise'])
row['hypothesis'] = sentence_encoder.encode(row['hypothesis'])
def __init__(self,
root: str,
normal_class=0,
tokenizer='spacy',
use_tfidf_weights=False,
append_sos=False,
append_eos=False,
clean_txt=False,
max_seq_len_prior=None):
super().__init__(root)
self.n_classes = 2 # 0: normal, 1: outlier
classes = [
'earn', 'acq', 'crude', 'trade', 'money-fx', 'interest', 'ship'
]
# classes_full_list = [
# 'acq', 'alum', 'barley', 'bop', 'carcass', 'castor-oil', 'cocoa', 'coconut', 'coconut-oil', 'coffee',
# 'copper', 'copra-cake', 'corn', 'cotton', 'cotton-oil', 'cpi', 'cpu', 'crude', 'dfl', 'dlr', 'dmk',
# 'earn', 'fuel', 'gas', 'gnp', 'gold', 'grain', 'groundnut', 'groundnut-oil', 'heat', 'hog', 'housing',
# 'income', 'instal-debt', 'interest', 'ipi', 'iron-steel', 'jet', 'jobs', 'l-cattle', 'lead', 'lei',
# 'lin-oil', 'livestock', 'lumber', 'meal-feed', 'money-fx', 'money-supply', 'naphtha', 'nat-gas', 'nickel',
# 'nkr', 'nzdlr', 'oat', 'oilseed', 'orange', 'palladium', 'palm-oil', 'palmkernel', 'pet-chem', 'platinum',
# 'potato', 'propane', 'rand', 'rape-oil', 'rapeseed', 'reserves', 'retail', 'rice', 'rubber', 'rye',
# 'ship', 'silver', 'sorghum', 'soy-meal', 'soy-oil', 'soybean', 'strategic-metal', 'sugar', 'sun-meal',
# 'sun-oil', 'sunseed', 'tea', 'tin', 'trade', 'veg-oil', 'wheat', 'wpi', 'yen', 'zinc'
# ]
self.normal_classes = [classes[normal_class]]
del classes[normal_class]
self.outlier_classes = classes
# Load the reuters dataset
self.train_set, self.test_set = reuters_dataset(directory=root,
train=True,
test=True,
clean_txt=clean_txt)
# Pre-process
self.train_set.columns.add('index')
self.test_set.columns.add('index')
self.train_set.columns.add('weight')
self.test_set.columns.add('weight')
train_idx_normal = [] # for subsetting train_set to normal class
for i, row in enumerate(self.train_set):
if any(label in self.normal_classes
for label in row['label']) and (len(row['label']) == 1):
train_idx_normal.append(i)
row['label'] = torch.tensor(0)
else:
row['label'] = torch.tensor(1)
row['text'] = row['text'].lower()
test_idx = [
] # for subsetting test_set to selected normal and anomalous classes
test_n_idx = [] # subsetting test_set to selected normal classes
test_a_idx = [] # subsetting test_set to selected anomalous classes
for i, row in enumerate(self.test_set):
if any(label in self.normal_classes
for label in row['label']) and (len(row['label']) == 1):
test_idx.append(i)
test_n_idx.append(i)
row['label'] = torch.tensor(0)
elif any(label in self.outlier_classes
for label in row['label']) and (len(row['label']) == 1):
test_idx.append(i)
test_a_idx.append(i)
row['label'] = torch.tensor(1)
else:
row['label'] = torch.tensor(1)
row['text'] = row['text'].lower()
# Subset train_set to normal class
self.train_set = Subset(self.train_set, train_idx_normal)
# Subset test_set to selected normal and anomalous classes
self.test_set = Subset(self.test_set, test_idx)
# Subset test_set to selected normal classes
self.test_n_set = Subset(self.test_set, test_n_idx)
# Subset test_set to selected anomalous classes
self.test_a_set = Subset(self.test_set, test_a_idx)
# Make corpus and set encoder
text_corpus = [
row['text']
for row in datasets_iterator(self.train_set, self.test_set)
]
if tokenizer == 'spacy':
self.encoder = SpacyEncoder(text_corpus,
min_occurrences=3,
append_eos=append_eos)
if tokenizer == 'bert':
self.encoder = MyBertTokenizer.from_pretrained('bert-base-uncased',
cache_dir=root)
# Encode
self.max_seq_len = 0
for row in datasets_iterator(self.train_set, self.test_set):
if append_sos:
sos_id = self.encoder.stoi[DEFAULT_SOS_TOKEN]
row['text'] = torch.cat((torch.tensor(sos_id).unsqueeze(0),
self.encoder.encode(row['text'])))
else:
row['text'] = self.encoder.encode(row['text'])
if len(row['text']) > self.max_seq_len:
self.max_seq_len = len(row['text'])
# Compute tf-idf weights
if use_tfidf_weights:
compute_tfidf_weights(self.train_set,
self.test_set,
vocab_size=self.encoder.vocab_size)
else:
for row in datasets_iterator(self.train_set, self.test_set):
row['weight'] = torch.empty(0)
# Get indices after pre-processing
for i, row in enumerate(self.train_set):
row['index'] = i
for i, row in enumerate(self.test_set):
row['index'] = i
# # length prior
sent_lengths = [len(row['text']) for row in self.train_set]
sent_lengths_freq = np.bincount(np.array(sent_lengths))
sent_lengths_freq = np.concatenate(
(sent_lengths_freq,
np.array((max_seq_len_prior - max(sent_lengths)) * [0])),
axis=0)
sent_lengths_freq = sent_lengths_freq + 1
self.length_prior = np.log(sent_lengths_freq) - np.log(
sent_lengths_freq.sum())
def load_data(data_type,
preprocessing=False,
fine_grained=False,
verbose=False,
text_length=5000,
encode=True,
load_SLE=False):
if data_type == 'imdb':
train_data, test_data = imdb_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'newsgroups':
train_data, test_data = newsgroups_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'reuters':
train_data, test_data = reuters_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
elif data_type == 'webkb':
train_data, test_data = webkb_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'cade':
train_data, test_data = cade_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'dbpedia':
train_data, test_data = dbpedia_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'agnews':
train_data, test_data = agnews_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'yahoo':
train_data, test_data = yahoo_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'sogou':
train_data, test_data = sogou_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'yelp':
train_data, test_data = yelp_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
elif data_type == 'amazon':
train_data, test_data = amazon_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
elif data_type == 'custom':
test_data = custom_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
sentence_encoder = pickle.load(open('epochs/sentence_encoder', 'rb'))
label_encoder = pickle.load(open('epochs/label_encoder', 'rb'))
for row in datasets_iterator(test_data):
row['text'] = sentence_encoder.encode(' '.join(row['text']))
row['label'] = label_encoder.encode(row['label'])
return sentence_encoder.vocab_size, label_encoder.vocab_size, test_data
else:
raise ValueError('{} data type not supported.'.format(data_type))
if encode:
if load_SLE:
sentence_encoder = pickle.load(
open('epochs/sentence_encoder', 'rb'))
label_encoder = pickle.load(open('epochs/label_encoder', 'rb'))
else:
sentence_corpus = [
row['text'] for row in datasets_iterator(train_data, )
]
label_corpus = [
row['label'] for row in datasets_iterator(train_data, )
]
sentence_encoder = WhitespaceEncoder(
sentence_corpus,
reserved_tokens=[PADDING_TOKEN, UNKNOWN_TOKEN])
label_encoder = IdentityEncoder(label_corpus, reserved_tokens=[])
with open('epochs/sentence_encoder', 'wb') as f:
pickle.dump(sentence_encoder, f)
with open('epochs/label_encoder', 'wb') as f:
pickle.dump(label_encoder, f)
# Encode
for row in datasets_iterator(train_data, test_data):
row['text'] = sentence_encoder.encode(row['text'])
row['label'] = label_encoder.encode(row['label'])
return sentence_encoder.vocab_size, label_encoder.vocab_size, train_data, test_data
else:
return train_data, test_data
def __init__(self,
root: str,
normal_class=0,
tokenizer='spacy',
use_tfidf_weights=False,
append_sos=False,
append_eos=False,
clean_txt=False,
max_seq_len_prior=None):
super().__init__(root)
self.n_classes = 2 # 0: normal, 1: outlier
classes = ['pos', 'neg']
if normal_class == -1:
self.normal_classes = classes
self.outlier_classes = []
else:
self.normal_classes = [classes[normal_class]]
del classes[normal_class]
self.outlier_classes = classes
if root not in nltk.data.path:
nltk.data.path.append(root)
# Load the imdb dataset
self.train_set, self.test_set = imdb_dataset(directory=root,
train=True,
test=True)
# Pre-process
self.train_set.columns.add('index')
self.test_set.columns.add('index')
self.train_set.columns.remove('sentiment')
self.test_set.columns.remove('sentiment')
self.train_set.columns.add('label')
self.test_set.columns.add('label')
self.train_set.columns.add('weight')
self.test_set.columns.add('weight')
train_idx_normal = [] # for subsetting train_set to normal class
for i, row in enumerate(self.train_set):
row['label'] = row.pop('sentiment')
if row['label'] in self.normal_classes:
train_idx_normal.append(i)
row['label'] = torch.tensor(0)
else:
row['label'] = torch.tensor(1)
if clean_txt:
row['text'] = clean_text(row['text'].lower())
else:
row['text'] = row['text'].lower()
test_n_idx = [] # subsetting test_set to selected normal classes
test_a_idx = [] # subsetting test_set to selected anomalous classes
for i, row in enumerate(self.test_set):
row['label'] = row.pop('sentiment')
if row['label'] in self.normal_classes:
test_n_idx.append(i)
else:
test_a_idx.append(i)
row['label'] = torch.tensor(
0) if row['label'] in self.normal_classes else torch.tensor(1)
if clean_txt:
row['text'] = clean_text(row['text'].lower())
else:
row['text'] = row['text'].lower()
# Subset train_set to normal class
self.train_set = Subset(self.train_set, train_idx_normal)
# Subset test_set to selected normal classes
self.test_n_set = Subset(self.test_set, test_n_idx)
# Subset test_set to selected anomalous classes
self.test_a_set = Subset(self.test_set, test_a_idx)
# Make corpus and set encoder
text_corpus = [
row['text']
for row in datasets_iterator(self.train_set, self.test_set)
]
if tokenizer == 'spacy':
self.encoder = SpacyEncoder(text_corpus,
min_occurrences=3,
append_eos=append_eos)
if tokenizer == 'bert':
self.encoder = MyBertTokenizer.from_pretrained('bert-base-uncased',
cache_dir=root)
# Encode
self.max_seq_len = 0
for row in datasets_iterator(self.train_set, self.test_set):
if append_sos:
sos_id = self.encoder.stoi[DEFAULT_SOS_TOKEN]
row['text'] = torch.cat((torch.tensor(sos_id).unsqueeze(0),
self.encoder.encode(row['text'])))
else:
row['text'] = self.encoder.encode(row['text'])
if len(row['text']) > self.max_seq_len:
self.max_seq_len = len(row['text'])
# Compute tf-idf weights
if use_tfidf_weights:
compute_tfidf_weights(self.train_set,
self.test_set,
vocab_size=self.encoder.vocab_size)
else:
for row in datasets_iterator(self.train_set, self.test_set):
row['weight'] = torch.empty(0)
# Get indices after pre-processing
for i, row in enumerate(self.train_set):
row['index'] = i
for i, row in enumerate(self.test_set):
row['index'] = i
# length prior
sent_lengths = [len(row['text']) for row in self.train_set]
sent_lengths_freq = np.bincount(np.array(sent_lengths))
sent_lengths_freq = np.concatenate(
(sent_lengths_freq,
np.array((max_seq_len_prior - max(sent_lengths)) * [0])),
axis=0)
sent_lengths_freq = sent_lengths_freq + 1
self.length_prior = np.log(sent_lengths_freq) - np.log(
sent_lengths_freq.sum())
def __init__(self, root: str, normal_class=0, tokenizer='spacy', use_tfidf_weights=False, append_sos=False,
append_eos=False, clean_txt=False):
super().__init__(root)
self.n_classes = 2 # 0: normal, 1: outlier
classes = ['pos', 'neg']
if normal_class == -1:
self.normal_classes = classes
self.outlier_classes = []
else:
self.normal_classes = [classes[normal_class]]
del classes[normal_class]
self.outlier_classes = classes
# Load the imdb dataset
self.train_set, self.test_set = imdb_dataset(directory=root, train=True, test=True)
# Pre-process
self.train_set.columns.add('index')
self.test_set.columns.add('index')
self.train_set.columns.remove('sentiment')
self.test_set.columns.remove('sentiment')
self.train_set.columns.add('label')
self.test_set.columns.add('label')
self.train_set.columns.add('weight')
self.test_set.columns.add('weight')
train_idx_normal = [] # for subsetting train_set to normal class
for i, row in enumerate(self.train_set):
row['label'] = row.pop('sentiment')
if row['label'] in self.normal_classes:
train_idx_normal.append(i)
row['label'] = torch.tensor(0)
else:
row['label'] = torch.tensor(1)
if clean_txt:
row['text'] = clean_text(row['text'].lower())
else:
row['text'] = row['text'].lower()
for i, row in enumerate(self.test_set):
row['label'] = row.pop('sentiment')
row['label'] = torch.tensor(0) if row['label'] in self.normal_classes else torch.tensor(1)
if clean_txt:
row['text'] = clean_text(row['text'].lower())
else:
row['text'] = row['text'].lower()
# Subset train_set to normal class
self.train_set = Subset(self.train_set, train_idx_normal)
# Make corpus and set encoder
text_corpus = [row['text'] for row in datasets_iterator(self.train_set, self.test_set)]
if tokenizer == 'spacy':
self.encoder = SpacyEncoder(text_corpus, min_occurrences=3, append_eos=append_eos)
if tokenizer == 'bert':
self.encoder = MyBertTokenizer.from_pretrained('bert-base-uncased', cache_dir=root)
# Encode
for row in datasets_iterator(self.train_set, self.test_set):
if append_sos:
sos_id = self.encoder.stoi[DEFAULT_SOS_TOKEN]
row['text'] = torch.cat((torch.tensor(sos_id).unsqueeze(0), self.encoder.encode(row['text'])))
else:
row['text'] = self.encoder.encode(row['text'])
# Compute tf-idf weights
if use_tfidf_weights:
compute_tfidf_weights(self.train_set, self.test_set, vocab_size=self.encoder.vocab_size)
else:
for row in datasets_iterator(self.train_set, self.test_set):
row['weight'] = torch.empty(0)
# Get indices after pre-processing
for i, row in enumerate(self.train_set):
row['index'] = i
for i, row in enumerate(self.test_set):
row['index'] = i
from torchnlp.text_encoders import WhitespaceEncoder, IdentityEncoder
from torchnlp import word_to_vector
from model import SNLIClassifier
from util import get_args, makedirs, collate_fn
args = get_args()
if args.gpu >= 0:
torch.cuda.set_device(args.gpu)
# load dataset
train, dev, test = snli_dataset(train=True, dev=True, test=True)
# Preprocess
for row in datasets_iterator(train, dev, test):
row['premise'] = row['premise'].lower()
row['hypothesis'] = row['hypothesis'].lower()
# Make Encoders
sentence_corpus = [
row['premise'] for row in datasets_iterator(train, dev, test)
]
sentence_corpus += [
row['hypothesis'] for row in datasets_iterator(train, dev, test)
]
sentence_encoder = WhitespaceEncoder(sentence_corpus)
label_corpus = [row['label'] for row in datasets_iterator(train, dev, test)]
label_encoder = IdentityEncoder(label_corpus)
def __init__(self,
root: str,
normal_class=0,
tokenizer='spacy',
use_tfidf_weights=False,
append_sos=False,
append_eos=False,
clean_txt=False,
max_seq_len_prior=None):
super().__init__(root)
self.n_classes = 2 # 0: normal, 1: outlier
classes = list(range(6))
groups = [[
'comp.graphics', 'comp.os.ms-windows.misc',
'comp.sys.ibm.pc.hardware', 'comp.sys.mac.hardware',
'comp.windows.x'
],
[
'rec.autos', 'rec.motorcycles', 'rec.sport.baseball',
'rec.sport.hockey'
], ['sci.crypt', 'sci.electronics', 'sci.med', 'sci.space'],
['misc.forsale'],
[
'talk.politics.misc', 'talk.politics.guns',
'talk.politics.mideast'
],
[
'talk.religion.misc', 'alt.atheism',
'soc.religion.christian'
]]
short_group_names = ['comp', 'rec', 'sci', 'misc', 'pol', 'rel']
self.subset = short_group_names[normal_class]
self.normal_classes = groups[normal_class]
self.outlier_classes = []
del classes[normal_class]
for i in classes:
self.outlier_classes += groups[i]
# Load the 20 Newsgroups dataset
self.train_set, self.test_set = newsgroups20_dataset(
directory=root,
train=True,
test=True,
clean_txt=clean_txt,
groups=groups,
short_group_names=short_group_names)
# Pre-process
self.train_set.columns.add('index')
self.test_set.columns.add('index')
self.train_set.columns.add('weight')
self.test_set.columns.add('weight')
train_idx_normal = [] # for subsetting train_set to normal class
for i, row in enumerate(self.train_set):
if row['label'] in self.normal_classes:
train_idx_normal.append(i)
row['label'] = torch.tensor(0)
else:
row['label'] = torch.tensor(1)
row['text'] = row['text'].lower()
test_n_idx = [] # subsetting test_set to selected normal classes
test_a_idx = [] # subsetting test_set to selected anomalous classes
for i, row in enumerate(self.test_set):
if row['label'] in self.normal_classes:
test_n_idx.append(i)
else:
test_a_idx.append(i)
row['label'] = torch.tensor(
0) if row['label'] in self.normal_classes else torch.tensor(1)
row['text'] = row['text'].lower()
# Subset train_set to normal class
self.train_set = Subset(self.train_set, train_idx_normal)
# Subset test_set to selected normal classes
self.test_n_set = Subset(self.test_set, test_n_idx)
# Subset test_set to selected anomalous classes
self.test_a_set = Subset(self.test_set, test_a_idx)
# Make corpus and set encoder
text_corpus = [
row['text']
for row in datasets_iterator(self.train_set, self.test_set)
]
if tokenizer == 'spacy':
self.encoder = SpacyEncoder(text_corpus,
min_occurrences=3,
append_eos=append_eos)
if tokenizer == 'bert':
self.encoder = MyBertTokenizer.from_pretrained('bert-base-uncased',
cache_dir=root)
# Encode
self.max_seq_len = 0
for row in datasets_iterator(self.train_set, self.test_set):
if append_sos:
sos_id = self.encoder.stoi[DEFAULT_SOS_TOKEN]
row['text'] = torch.cat((torch.tensor(sos_id).unsqueeze(0),
self.encoder.encode(row['text'])))
else:
row['text'] = self.encoder.encode(row['text'])
if len(row['text']) > self.max_seq_len:
self.max_seq_len = len(row['text'])
# Compute tf-idf weights
if use_tfidf_weights:
compute_tfidf_weights(self.train_set,
self.test_set,
vocab_size=self.encoder.vocab_size)
else:
for row in datasets_iterator(self.train_set, self.test_set):
row['weight'] = torch.empty(0)
# Get indices after pre-processing
for i, row in enumerate(self.train_set):
row['index'] = i
for i, row in enumerate(self.test_set):
row['index'] = i
# length prior
sent_lengths = [len(row['text']) for row in self.train_set]
sent_lengths_freq = np.bincount(np.array(sent_lengths))
sent_lengths_freq = np.concatenate(
(sent_lengths_freq,
np.array((max_seq_len_prior - max(sent_lengths)) * [0])),
axis=0)
sent_lengths_freq = sent_lengths_freq + 1
self.length_prior = np.log(sent_lengths_freq) - np.log(
sent_lengths_freq.sum())
def load_data(data_type,
preprocessing=False,
fine_grained=False,
verbose=False,
text_length=5000,
encode=True):
if data_type == 'imdb':
train_data, test_data = imdb_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'newsgroups':
train_data, test_data = newsgroups_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'reuters':
train_data, test_data = reuters_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
elif data_type == 'webkb':
train_data, test_data = webkb_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'cade':
train_data, test_data = cade_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'dbpedia':
train_data, test_data = dbpedia_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'agnews':
train_data, test_data = agnews_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'yahoo':
train_data, test_data = yahoo_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'sogou':
train_data, test_data = sogou_dataset(preprocessing=preprocessing,
verbose=verbose,
text_length=text_length)
elif data_type == 'yelp':
train_data, test_data = yelp_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
elif data_type == 'amazon':
train_data, test_data = amazon_dataset(preprocessing=preprocessing,
fine_grained=fine_grained,
verbose=verbose,
text_length=text_length)
else:
raise ValueError('{} data type not supported.'.format(data_type))
if encode:
sentence_corpus = [
row['text'] for row in datasets_iterator(train_data, )
]
sentence_encoder = WhitespaceEncoder(
sentence_corpus,
reserved_tokens=[DEFAULT_PADDING_TOKEN, DEFAULT_UNKNOWN_TOKEN])
label_corpus = [
row['label'] for row in datasets_iterator(train_data, )
]
label_encoder = LabelEncoder(label_corpus, reserved_labels=[])
# Encode
for row in datasets_iterator(train_data, test_data):
row['text'] = sentence_encoder.encode(row['text'])
row['label'] = label_encoder.encode(row['label'])
return sentence_encoder, label_encoder, train_data, test_data
else:
return train_data, test_data
def main():
ROOT_DIR = os.path.join(str(Path.home()), '.torchtext')
# define parameters and hyperparameters
args = {
'data_dir': ROOT_DIR,
'use_cuda': True,
'test_batch_size': 128,
'dev_size': 0.1,
'checkpoint': True,
'early_stopping': False,
'epochs': 5,
'd_embedding': 300,
'word_vectors': 'glove.840B.300d',
'word_vectors_freeze': True,
'vector_cache_dir': os.path.join(ROOT_DIR, 'vector_cache'),
'momentum': .9,
'seed': 42,
'visdom_env': 'main',
}
args = Args(**args)
vis = visdom.Visdom()
if not vis.check_connection():
raise RuntimeError(
"Visdom server not running. Please run python -m visdom.server")
torch.manual_seed(args.seed)
device = torch.device('cuda' if args.use_cuda else 'cpu')
# Load dataset splits
train, test = trec_dataset(train=True, test=True, directory=args.data_dir)
# Create encoders (TODO: best way to persist those?)
text_corpus = [row['text'] for row in datasets_iterator(train, test)]
text_encoder = WhitespaceEncoder(text_corpus)
label_corpus = [row['label'] for row in datasets_iterator(train, test)]
label_encoder = LabelEncoder(label_corpus)
# encode dataset splits
for row in datasets_iterator(train, test):
row['text'] = text_encoder.encode(row['text'])
row['label'] = label_encoder.encode(row['label'])
# create sampler for train / dev split used in dataloader
train_sampler, dev_sampler = train_test_split_sampler(
train, test_size=args.dev_size, random_state=args.seed)
def delete_checkpoint(path):
checkpoint_files = list(path.glob('checkpoint_model*.pth'))
if checkpoint_files:
os.remove(checkpoint_files[0])
visdom_logger = VisdomRunSummaryLogger(env=args.visdom_env,
clear_batch_summary=True)
# TODO: abstract this part
run_config = {'run': 0}
# train function
def train_f(config):
run_name = 'run_%d' % run_config['run']
run_config['run'] = run_config['run'] + 1
visdom_logger.new_run(run_name)
model_path = Path('/tmp/models/')
delete_checkpoint(model_path)
train_batch_sampler = FlexibleBucketBatchSampler(
train,
config.batch_size,
sampler=train_sampler,
drop_last=True,
sort_key=lambda r: len(row['text']))
train_loader = DataLoader(train,
batch_sampler=train_batch_sampler,
collate_fn=collate_fn,
pin_memory=config.use_cuda,
num_workers=0)
dev_batch_sampler = FlexibleBucketBatchSampler(
train,
config.test_batch_size,
drop_last=True,
sampler=dev_sampler,
sort_key=lambda r: len(row['text']))
dev_loader = DataLoader(train,
batch_sampler=dev_batch_sampler,
collate_fn=collate_fn,
pin_memory=config.use_cuda,
num_workers=0)
test_sampler = BucketBatchSampler(test,
config.test_batch_size,
drop_last=True,
sort_key=lambda r: len(row['text']))
test_loader = DataLoader(test,
batch_sampler=test_sampler,
collate_fn=collate_fn,
pin_memory=config.use_cuda,
num_workers=0)
embedding = nn.Embedding(text_encoder.vocab_size, config.d_embedding)
if config.word_vectors_freeze:
embedding.weight.requires_grad = False
if config.word_vectors:
# Load word vectors
word_vectors = word_to_vector.aliases[config.word_vectors](
cache=config.vector_cache_dir)
for i, token in enumerate(text_encoder.vocab):
embedding.weight.data[i] = word_vectors[token]
print(
'Found vectors for %d tokens in vocabulary' %
len([t for t in text_encoder.vocab if t in word_vectors.stoi]))
model = LSTMClassifier(d_in=embedding.embedding_dim,
d_out=label_encoder.vocab_size,
d_hidden=config.d_hidden,
dropout=config.dropout,
embedding=embedding)
model.to(device)
optimizer_params = list(
filter(lambda p: p.requires_grad, model.parameters()))
optimizer = torch.optim.SGD(optimizer_params,
lr=config.lr,
momentum=config.momentum)
trainer = create_supervised_trainer(model,
optimizer,
F.nll_loss,
device=device)
evaluator_train = \
create_supervised_evaluator(model,
metrics={
'accuracy': CategoricalAccuracy(),
'nll': Loss(F.nll_loss)},
device=device)
evaluator_dev = \
create_supervised_evaluator(model,
metrics={
'accuracy': CategoricalAccuracy(),
'nll': Loss(F.nll_loss)},
device=device)
visdom_logger.attach_trainer(trainer)
visdom_logger.attach_evaluator(evaluator_train, trainer, phase='train')
visdom_logger.attach_evaluator(evaluator_dev, trainer, phase='dev')
lr_scheduler = torch.optim.lr_scheduler.LambdaLR(
optimizer, lambda epoch_: 1. / (1 + config.lr_decay *
(epoch_ - 1)))
# scoring function for early stopping and checkpointing
def score_function(engine):
dev_loss = engine.state.metrics['nll']
return -dev_loss
early_stopping = EarlyStopping(patience=15,
score_function=score_function,
trainer=trainer)
def checkpoint_score_function(engine):
dev_accuracy = engine.state.metrics['accuracy']
return dev_accuracy
checkpoint = ModelCheckpoint('/tmp/models',
'checkpoint',
score_function=checkpoint_score_function,
n_saved=1,
create_dir=True,
score_name="dev_accuracy")
# lets train!
train_model(
model=model,
trainer=trainer,
epochs=config.epochs,
evaluator_train=evaluator_train,
evaluator_dev=evaluator_dev,
train_loader=train_loader,
dev_loader=dev_loader,
lr_scheduler=lr_scheduler,
early_stopping=early_stopping if config.early_stopping else None,
checkpoint=checkpoint if config.checkpoint else None)
# load checkpointed (best) model and evaluate on test loader
model = torch.load(list(model_path.glob('checkpoint_model*.pth'))[0])
test_evaluator = \
create_supervised_evaluator(model,
metrics={
'accuracy': CategoricalAccuracy(),
'nll': Loss(F.nll_loss)},
device=device)
test_evaluator.run(test_loader)
metrics = test_evaluator.state.metrics
print("Test Results: Avg accuracy: {:.2f} Avg loss: {:.2f}".format(
metrics['accuracy'], metrics['nll']))
test_evaluator.run(dev_loader)
metrics = test_evaluator.state.metrics
return metrics['nll']
# hyperparameter tuning!
hp_opt = HPOptimizer(args=args,
strategy='gp',
space=[
Real(0.1, 0.5, name='dropout'),
Categorical([50, 100, 150, 200], name='d_hidden'),
Real(1e-4, 1, prior='log-uniform', name='lr'),
Real(1e-3,
1,
prior='log-uniform',
name='lr_decay'),
Categorical([4, 8, 16, 32, 64, 128],
name='batch_size')
])
hp_opt.add_callback(visdom_logger.run_summary)
result = hp_opt.minimize(train_f, n_calls=10)
print(result)
