def __init__(
self,
TOK_PATH=Path('./senior_proj_itos'),
BOS='xxbos',
EOS='xxeos',
FLD='xxfld',
UNK='xxunk',
PAD='xxpad',
TK_REP='xxrep',
TK_WREP='xxwrep',
TK_NUM='xxnum',
TK_LAUGH='xxlaugh',
n_cpus=1,
):
from senior_project_util import ThaiTokenizer, pre_rules_th, post_rules_th
from fastai.text.transform import BaseTokenizer, Tokenizer, Vocab
from fastai.text.data import TokenizeProcessor, NumericalizeProcessor
with open(TOK_PATH / "bert_itos_80k_cleaned.pkl", 'rb') as f:
itos = pickle.load(f)
self.vocab = Vocab(itos)
self.tokenizer = Tokenizer(tok_func=ThaiTokenizer,
lang='th',
pre_rules=pre_rules_th,
post_rules=post_rules_th,
n_cpus=n_cpus)
self.cls_token_id = self.vocab.stoi[BOS]
self.sep_token_id = self.vocab.stoi[EOS]
self.pad_token_id = self.vocab.stoi[PAD]
self.mask_token = FLD #SINCE THIS ONE IS NOT USED, and INSIDE SPECIAL TOKEN....
self._pad_token = PAD
class CustomSeniorProjectTokenizer(object):
def __init__(self, TOK_PATH = Path('./senior_proj_itos'), BOS='xxbos', EOS='xxeos', FLD = 'xxfld', UNK='xxunk', PAD='xxpad',
TK_REP='xxrep', TK_WREP='xxwrep', TK_NUM='xxnum', TK_LAUGH='xxlaugh'
):
from senior_project_util import ThaiTokenizer, pre_rules_th, post_rules_th
from fastai.text.transform import BaseTokenizer, Tokenizer, Vocab
from fastai.text.data import TokenizeProcessor, NumericalizeProcessor
with open(TOK_PATH/"bert_itos_80k_cleaned.pkl", 'rb') as f:
itos = pickle.load(f)
self.vocab = Vocab(itos)
self.tokenizer = Tokenizer(tok_func = ThaiTokenizer, lang = 'th',
pre_rules = pre_rules_th, post_rules=post_rules_th, n_cpus=1)
self.cls_token_id = self.vocab.stoi[BOS]
self.sep_token_id = self.vocab.stoi[EOS]
# tokenizer_processor = TokenizeProcessor(tokenizer=tt, chunksize=300000, mark_fields=False)
# numbericalize_processor = NumericalizeProcessor(vocab=vocab)
def num_special_tokens_to_add(self, pair=False):
return 2
def tokenize(self, text):
return self.tokenizer._process_all_1([text])[0]
# return self.tokenizer.process_all([text])[0]
def convert_tokens_to_ids(self, token_list):
return self.vocab.numericalize(token_list)
def build_inputs_with_special_tokens(self, token_list):
# From https://github.com/huggingface/transformers/blob/master/src/transformers/tokenization_bert.py#L235
return [self.cls_token_id] + token_list + [self.sep_token_id]
def get_sentencepiece(path: PathOrStr,
trn_path: Path,
name: str,
pre_rules: ListRules = None,
post_rules: ListRules = None,
vocab_size: int = 30000,
model_type: str = 'unigram',
input_sentence_size: int = 1E7,
pad_idx: int = PAD_TOKEN_ID):
try:
import sentencepiece as spm
except ImportError:
raise Exception(
'sentencepiece module is missing: run `pip install sentencepiece`')
path = pathlib.Path(path)
cache_name = 'tmp'
os.makedirs(path / cache_name, exist_ok=True)
os.makedirs(path / 'models', exist_ok=True)
pre_rules = pre_rules if pre_rules is not None else []
post_rules = post_rules if post_rules is not None else []
# load the text frmo the train tokens file
text = [line.rstrip('\n') for line in open(trn_path)]
text = list(filter(None, text))
if not os.path.isfile(path / 'models' / 'spm.model') or not os.path.isfile(
path / 'models' / f'itos_{name}.pkl'):
raw_text = reduce(lambda t, rule: rule(t), pre_rules, '\n'.join(text))
raw_text_path = path / cache_name / 'all_text.txt'
with open(raw_text_path, 'w') as f:
f.write(raw_text)
sp_params = f"--input={raw_text_path} --pad_id={pad_idx} --unk_id=0 " \
f"--character_coverage=1.0 --bos_id=-1 --eos_id=-1 " \
f"--input_sentence_size={int(input_sentence_size)} " \
f"--model_prefix={path / 'models' / 'spm'} " \
f"--vocab_size={vocab_size} --model_type={model_type} "
spm.SentencePieceTrainer.Train(sp_params)
with open(path / 'models' / 'spm.vocab', 'r') as f:
vocab = [line.split('\t')[0] for line in f.readlines()]
vocab[0] = UNK
vocab[pad_idx] = PAD
pickle.dump(vocab, open(path / 'models' / f'itos_{name}.pkl', 'wb'))
# todo add post rules
vocab = Vocab(pickle.load(open(path / 'models' / f'itos_{name}.pkl',
'rb')))
# We cannot use lambdas or local methods here, since `tok_func` needs to be
# pickle-able in order to be called in subprocesses when multithread tokenizing
tokenizer = Tokenizer(tok_func=SentencepieceTokenizer,
lang=str(path / 'models'),
pre_rules=pre_rules,
post_rules=post_rules)
clear_cache_directory(path, cache_name)
return {'tokenizer': tokenizer, 'vocab': vocab}
def get_vocab():
if conf['vocab_path'] is not None:
vocab_obj = pickle.load(
open(conf['local_project_path'] + conf['vocab_path'], 'rb'))
vocab_class_obj = Vocab.load(conf['local_project_path'] +
conf['vocab_path'])
log.debug('vocab object loaded, len ' + str(len(vocab_obj)))
else:
vocab_obj = None
vocab_class_obj = None
return vocab_obj, vocab_class_obj
def get_datasets(dataset, dataset_dir, bptt, bs, lang, max_vocab, ds_pct, lm_type):
tmp_dir = dataset_dir / 'tmp'
tmp_dir.mkdir(exist_ok=True)
vocab_file = tmp_dir / f'vocab_{lang}.pkl'
if not (tmp_dir / f'{TRN}_{lang}_ids.npy').exists():
print('Reading the data...')
toks, lbls = read_clas_data(dataset_dir, dataset, lang)
# create the vocabulary
counter = Counter(word for example in toks[TRN]+toks[TST]+toks[VAL] for word in example)
itos = [word for word, count in counter.most_common(n=max_vocab)]
itos.insert(0, PAD)
itos.insert(0, UNK)
vocab = Vocab(itos)
stoi = vocab.stoi
with open(vocab_file, 'wb') as f:
pickle.dump(vocab, f)
ids = {}
for split in [TRN, VAL, TST]:
ids[split] = np.array([([stoi.get(w, stoi[UNK]) for w in s])
for s in toks[split]])
np.save(tmp_dir / f'{split}_{lang}_ids.npy', ids[split])
np.save(tmp_dir / f'{split}_{lang}_lbl.npy', lbls[split])
else:
print('Loading the pickled data...')
ids, lbls = {}, {}
for split in [TRN, VAL, TST]:
ids[split] = np.load(tmp_dir / f'{split}_{lang}_ids.npy')
lbls[split] = np.load(tmp_dir / f'{split}_{lang}_lbl.npy')
with open(vocab_file, 'rb') as f:
vocab = pickle.load(f)
print(f'Train size: {len(ids[TRN])}. Valid size: {len(ids[VAL])}. '
f'Test size: {len(ids[TST])}.')
if ds_pct < 1.0:
print(f"Making the dataset smaller {ds_pct}")
for split in [TRN, VAL, TST]:
ids[split] = np.array([np.array(e, dtype=np.int) for e in ids[split]])
#print([lbl for lbl in lbls[split] if not int(lbl) in [0,1,2]]) # debug by ak
#print(f'First 10 lbls[split] labels: {lbls[split][:11]}')
if split == TRN: print("processing TRN labels ... ")
lbls[split] = np.array([np.array(e, dtype=np.int) for e in lbls[split]])
if split == TRN: print("Info: Passed the train labels lbls[split] to np.array sucessfully .....")
data_lm = TextLMDataBunch.from_ids(path=tmp_dir, vocab=vocab, train_ids=np.concatenate([ids[TRN],ids[TST]]),
valid_ids=ids[VAL], bs=bs, bptt=bptt, lm_type=lm_type)
# TODO TextClasDataBunch allows tst_ids as input, but not tst_lbls?
data_clas = TextClasDataBunch.from_ids(
path=tmp_dir, vocab=vocab, train_ids=ids[TRN], valid_ids=ids[VAL],
train_lbls=lbls[TRN], valid_lbls=lbls[VAL], bs=bs, classes={l:l for l in lbls[TRN]})
print(f"Sizes of train_ds {len(data_clas.train_ds)}, valid_ds {len(data_clas.valid_ds)}")
return data_clas, data_lm
def load_cls_data_old_for_xnli(self, bs):
tmp_dir = self.cache_dir
tmp_dir.mkdir(exist_ok=True)
vocab_file = tmp_dir / f'vocab_{self.lang}.pkl'
if not (tmp_dir / f'{TRN}_{self.lang}_ids.npy').exists():
print('Reading the data...')
toks, lbls = read_clas_data(self.dataset_dir, self.dataset_dir.name, self.lang)
# create the vocabulary
counter = Counter(word for example in toks[TRN] + toks[TST] + toks[VAL] for word in example)
itos = [word for word, count in counter.most_common(n=self.max_vocab)]
itos.insert(0, PAD)
itos.insert(0, UNK)
vocab = Vocab(itos)
stoi = vocab.stoi
with open(vocab_file, 'wb') as f:
pickle.dump(vocab, f)
ids = {}
for split in [TRN, VAL, TST]:
ids[split] = np.array([([stoi.get(w, stoi[UNK]) for w in s])
for s in toks[split]])
np.save(tmp_dir / f'{split}_{self.lang}_ids.npy', ids[split])
np.save(tmp_dir / f'{split}_{self.lang}_lbl.npy', lbls[split])
else:
print('Loading the pickled data...')
ids, lbls = {}, {}
for split in [TRN, VAL, TST]:
ids[split] = np.load(tmp_dir / f'{split}_{self.lang}_ids.npy')
lbls[split] = np.load(tmp_dir / f'{split}_{self.lang}_lbl.npy')
with open(vocab_file, 'rb') as f:
vocab = pickle.load(f)
print(f'Train size: {len(ids[TRN])}. Valid size: {len(ids[VAL])}. '
f'Test size: {len(ids[TST])}.')
for split in [TRN, VAL, TST]:
ids[split] = np.array([np.array(e, dtype=np.int) for e in ids[split]])
lbls[split] = np.array([np.array(e, dtype=np.int) for e in lbls[split]])
data_lm = TextLMDataBunch.from_ids(path=tmp_dir, vocab=vocab, train_ids=np.concatenate([ids[TRN], ids[TST]]),
valid_ids=ids[VAL], bs=bs, bptt=self.bptt, lm_type=self.lm_type)
# TODO TextClasDataBunch allows tst_ids as input, but not tst_lbls?
data_clas = TextClasDataBunch.from_ids(
path=tmp_dir, vocab=vocab, train_ids=ids[TRN], valid_ids=ids[VAL],
train_lbls=lbls[TRN], valid_lbls=lbls[VAL], bs=bs, classes={l: l for l in lbls[TRN]})
print(f"Sizes of train_ds {len(data_clas.train_ds)}, valid_ds {len(data_clas.valid_ds)}")
return data_clas, data_lm
class CustomSeniorProjectTokenizer(object):
def __init__(self, TOK_PATH = Path('./senior_proj_itos'), BOS='xxbos', EOS='xxeos', FLD = 'xxfld', UNK='xxunk', PAD='xxpad',
TK_REP='xxrep', TK_WREP='xxwrep', TK_NUM='xxnum', TK_LAUGH='xxlaugh', n_cpus=1,
):
from senior_project_util import ThaiTokenizer, pre_rules_th, post_rules_th
from fastai.text.transform import BaseTokenizer, Tokenizer, Vocab
from fastai.text.data import TokenizeProcessor, NumericalizeProcessor
with open(TOK_PATH/"bert_itos_80k_cleaned.pkl", 'rb') as f:
itos = pickle.load(f)
self.vocab = Vocab(itos)
self.tokenizer = Tokenizer(tok_func = ThaiTokenizer, lang = 'th',
pre_rules = pre_rules_th, post_rules=post_rules_th, n_cpus=n_cpus)
self.cls_token_id = self.vocab.stoi[BOS]
self.sep_token_id = self.vocab.stoi[EOS]
self.pad_token_id = self.vocab.stoi[PAD]
self.mask_token = FLD #SINCE THIS ONE IS NOT USED, and INSIDE SPECIAL TOKEN....
self._pad_token = PAD
# tokenizer_processor = TokenizeProcessor(tokenizer=tt, chunksize=300000, mark_fields=False)
# numbericalize_processor = NumericalizeProcessor(vocab=vocab)
def num_special_tokens_to_add(self, pair=False):
return 2
def tokenize(self, text):
return self.tokenizer._process_all_1([text])[0]
# return self.tokenizer.process_all([text])[0]
def convert_tokens_to_ids(self, token_list):
#From https://huggingface.co/transformers/_modules/transformers/tokenization_utils_fast.html#PreTrainedTokenizerFast.convert_tokens_to_ids
if token_list is None:
return None
if isinstance(token_list, str):
return self.vocab.numericalize([token_list])[0]
return self.vocab.numericalize(token_list)
def build_inputs_with_special_tokens(self, token_list):
# From https://github.com/huggingface/transformers/blob/master/src/transformers/tokenization_bert.py#L235
return [self.cls_token_id] + token_list + [self.sep_token_id]
def get_special_tokens_mask(
self, token_ids_0, token_ids_1 = None, already_has_special_tokens = False
):
# From https://huggingface.co/transformers/_modules/transformers/tokenization_utils.html#PreTrainedTokenizer.get_special_tokens_mask
"""
Retrieves sequence ids from a token list that has no special tokens added. This method is called when adding
special tokens using the tokenizer ``prepare_for_model`` method.
Args:
token_ids_0: list of ids (must not contain special tokens)
token_ids_1: Optional list of ids (must not contain special tokens), necessary when fetching sequence ids
for sequence pairs
already_has_special_tokens: (default False) Set to True if the token list is already formated with
special tokens for the model
Returns:
A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
"""
return [0] * ((len(token_ids_1) if token_ids_1 else 0) + len(token_ids_0))
def __len__(self):
#https://huggingface.co/transformers/_modules/transformers/tokenization_utils_fast.html#PreTrainedTokenizerFast.__len__
return len(self.vocab.itos)
import fastai
print(f"Running on Fastai version: {fastai.__version__}")
# In[15]:
with open(TOK_PATH/"bert_itos_80k_cleaned.pkl", 'rb') as f:
itos = pickle.load(f)
# len(itos)
# In[16]:
vocab = Vocab(itos)
# In[18]:
# tt = Tokenizer(tok_func = ThaiTokenizer, lang = 'th', pre_rules = pre_rules_th, post_rules=post_rules_th, n_cpus=1)
# test_sample = tt._process_all_1([text[:100]])
# print(test_sample)
# test_sample = [vocab.numericalize(seq) for seq in test_sample]
# print(test_sample)
# In[21]:
- test_texts
- test_labels
:return:
"""
pass
def tokenizer(texts): # create a tokenizer function
tok = TextTokenizer('en')
return tok.process_all(texts)
if __name__ == "__main__":
# 1. Download data
# untar_data(URI)
# 2. Read data and save with 'normal' format: text, label
# texts, labels, label_index = parse_text_data()
# df = pd.DataFrame.from_dict({'text': texts, 'label': labels})
# df.to_csv('./data/20_newsgroup.csv', index=None)
# 3. Tokenize text to create vocabulary
df = pd.read_csv('./data/20_newsgroup.csv')
tokens = tokenizer(df[:10]['text'].tolist())
vocab = Vocab.create(tokens, max_vocab=1000, min_freq=2)
print(vocab.itos)
print(vocab.stoi)
# 4. create embedding matrix from pretrained word vectors
def new_train_clas(data_dir,
lang='en',
cuda_id=0,
pretrain_name='wt103',
model_dir='models',
qrnn=False,
fine_tune=True,
max_vocab=30000,
bs=20,
bptt=70,
name='imdb-clas',
dataset='imdb',
ds_pct=1.0):
"""
:param data_dir: The path to the `data` directory
:param lang: the language unicode
:param cuda_id: The id of the GPU. Uses GPU 0 by default or no GPU when
run on CPU.
:param pretrain_name: name of the pretrained model
:param model_dir: The path to the directory where the pretrained model is saved
:param qrrn: Use a QRNN. Requires installing cupy.
:param fine_tune: Fine-tune the pretrained language model
:param max_vocab: The maximum size of the vocabulary.
:param bs: The batch size.
:param bptt: The back-propagation-through-time sequence length.
:param name: The name used for both the model and the vocabulary.
:param dataset: The dataset used for evaluation. Currently only IMDb and
XNLI are implemented. Assumes dataset is located in `data`
folder and that name of folder is the same as dataset name.
"""
results = {}
if not torch.cuda.is_available():
print('CUDA not available. Setting device=-1.')
cuda_id = -1
torch.cuda.set_device(cuda_id)
print(f'Dataset: {dataset}. Language: {lang}.')
assert dataset in DATASETS, f'Error: {dataset} processing is not implemented.'
assert (dataset == 'imdb' and lang == 'en') or not dataset == 'imdb',\
'Error: IMDb is only available in English.'
data_dir = Path(data_dir)
assert data_dir.name == 'data',\
f'Error: Name of data directory should be data, not {data_dir.name}.'
dataset_dir = data_dir / dataset
model_dir = Path(model_dir)
if qrnn:
print('Using QRNNs...')
model_name = 'qrnn' if qrnn else 'lstm'
lm_name = f'{model_name}_{pretrain_name}'
pretrained_fname = (lm_name, f'itos_{pretrain_name}')
ensure_paths_exists(data_dir, dataset_dir, model_dir,
model_dir / f"{pretrained_fname[0]}.pth",
model_dir / f"{pretrained_fname[1]}.pkl")
tmp_dir = dataset_dir / 'tmp'
tmp_dir.mkdir(exist_ok=True)
vocab_file = tmp_dir / f'vocab_{lang}.pkl'
if not (tmp_dir / f'{TRN}_{lang}_ids.npy').exists():
print('Reading the data...')
toks, lbls = read_clas_data(dataset_dir, dataset, lang)
# create the vocabulary
counter = Counter(word for example in toks[TRN] for word in example)
itos = [word for word, count in counter.most_common(n=max_vocab)]
itos.insert(0, PAD)
itos.insert(0, UNK)
vocab = Vocab(itos)
stoi = vocab.stoi
with open(vocab_file, 'wb') as f:
pickle.dump(vocab, f)
ids = {}
for split in [TRN, VAL, TST]:
ids[split] = np.array([([stoi.get(w, stoi[UNK]) for w in s])
for s in toks[split]])
np.save(tmp_dir / f'{split}_{lang}_ids.npy', ids[split])
np.save(tmp_dir / f'{split}_{lang}_lbl.npy', lbls[split])
else:
print('Loading the pickled data...')
ids, lbls = {}, {}
for split in [TRN, VAL, TST]:
ids[split] = np.load(tmp_dir / f'{split}_{lang}_ids.npy')
lbls[split] = np.load(tmp_dir / f'{split}_{lang}_lbl.npy')
with open(vocab_file, 'rb') as f:
vocab = pickle.load(f)
print(f'Train size: {len(ids[TRN])}. Valid size: {len(ids[VAL])}. '
f'Test size: {len(ids[TST])}.')
if ds_pct < 1.0:
print(f"Makeing the dataset smaller {ds_pct}")
for split in [TRN, VAL, TST]:
ids[split] = ids[split][:int(len(ids[split]) * ds_pct)]
data_lm = TextLMDataBunch.from_ids(path=tmp_dir,
vocab=vocab,
train_ids=ids[TRN],
valid_ids=ids[VAL],
bs=bs,
bptt=bptt)
# TODO TextClasDataBunch allows tst_ids as input, but not tst_lbls?
data_clas = TextClasDataBunch.from_ids(path=tmp_dir,
vocab=vocab,
train_ids=ids[TRN],
valid_ids=ids[VAL],
train_lbls=lbls[TRN],
valid_lbls=lbls[VAL],
bs=bs)
if qrnn:
emb_sz, nh, nl = 400, 1550, 3
else:
emb_sz, nh, nl = 400, 1150, 3
learn = language_model_learner(data_lm,
bptt=bptt,
emb_sz=emb_sz,
nh=nh,
nl=nl,
qrnn=qrnn,
pad_token=PAD_TOKEN_ID,
pretrained_fnames=pretrained_fname,
path=model_dir.parent,
model_dir=model_dir.name)
lm_enc_finetuned = f"{lm_name}_{dataset}_enc"
if fine_tune and not (model_dir / f"lm_enc_finetuned.pth").exists():
print('Fine-tuning the language model...')
learn.unfreeze()
learn.fit(2, slice(1e-4, 1e-2))
# save encoder
learn.save_encoder(lm_enc_finetuned)
print("Starting classifier training")
learn = text_classifier_learner(data_clas,
bptt=bptt,
pad_token=PAD_TOKEN_ID,
path=model_dir.parent,
model_dir=model_dir.name,
qrnn=qrnn,
emb_sz=emb_sz,
nh=nh,
nl=nl)
learn.load_encoder(lm_enc_finetuned)
learn.fit_one_cycle(1, 2e-2, moms=(0.8, 0.7), wd=1e-7)
learn.freeze_to(-2)
learn.fit_one_cycle(1,
slice(1e-2 / (2.6**4), 1e-2),
moms=(0.8, 0.7),
wd=1e-7)
learn.freeze_to(-3)
learn.fit_one_cycle(1,
slice(5e-3 / (2.6**4), 5e-3),
moms=(0.8, 0.7),
wd=1e-7)
learn.unfreeze()
learn.fit_one_cycle(2,
slice(1e-3 / (2.6**4), 1e-3),
moms=(0.8, 0.7),
wd=1e-7)
results['accuracy'] = learn.validate()[1]
print(f"Saving models at {learn.path / learn.model_dir}")
learn.save(f'{model_name}_{name}')
return results
import fastai
print(f"Running on Fastai version: {fastai.__version__}")
# In[15]:
with open(TOK_PATH/"bert_itos_80k_cleaned.pkl", 'rb') as f:
itos = pickle.load(f)
len(itos)
# In[16]:
vocab = Vocab(itos)
# In[17]:
pyThai_tt = ThaiTokenizer()
# In[18]:
tt = Tokenizer(tok_func = ThaiTokenizer, lang = 'th', pre_rules = pre_rules_th, post_rules=post_rules_th, n_cpus=1)
test_sample = tt._process_all_1([text[:100]])
print(test_sample)
test_sample = [vocab.numericalize(seq) for seq in test_sample]
print(test_sample)
import numpy
import torch
from torch.nn import functional
from torch import nn
from fastai.text.transform import Vocab
import unidecode
import string
# Taken from https://gist.github.com/jvns/b6dda36b2fdcc02b833ed5b0c7a09112
# Download Hans Christian Anderson's fairy tales
# !wget -O fairy-tales.txt https://www.gutenberg.org/cache/epub/27200/pg27200.txt > /dev/null 2>&1
file = unidecode.unidecode(open('fairy-tales.txt').read())
# Remove the table of contents & Gutenberg preamble
text = file[5000:]
v = Vocab.create((x for x in text), max_vocab=400, min_freq=1)
num_letters = len(v.itos)
# training_set = torch.Tensor(v.numericalize([x for x in text])).type(torch.LongTensor).cuda()
training_set = torch.Tensor(v.numericalize([x for x in text
])).type(torch.LongTensor)
training_set = training_set[:100000]
class MyLSTM(nn.Module):
def __init__(self, input_size, hidden_size):
super().__init__()
self.lstm = nn.LSTM(input_size, hidden_size, batch_first=True)
self.h2o = nn.Linear(hidden_size, input_size)
self.input_size = input_size
self.hidden = None
