def __init__(self, vocab_size, embedding_dim, max_sequence_len):
self.vocab_size = vocab_size
self.embedding_dim = embedding_dim
self.max_sequence_len = max_sequence_len
self.bpemb_en_100k = BPEmb(lang="en",
vs=self.vocab_size,
dim=self.embedding_dim) # 40 M；词表越大切分越少
class SubWordVocab(object):
def __init__(self, size):
self.encoder = BPEmb(lang='en', vs=size)
assert self.sos_id == 1
assert self.eos_id == 2
def __len__(self):
return self.encoder.vs
@property
def sos_id(self):
return 1
@property
def eos_id(self):
return self.encoder.EOS
def encode(self, syms):
return self.encoder.encode_ids(syms)
def decode(self, ids):
syms = self.encoder.decode_ids(ids)
if isinstance(syms, list):
return ''
return syms
class BPEmbVaeSampler(VAESampler):
def __init__(self, lang, vs, dim, decode_from, params, cuda=False):
self.bp = BPEmb(lang=lang, vs=vs, dim=dim)
super().__init__(decode_from, params, cuda)
def to_s(self, decoded):
out = []
for item in decoded:
s = self.bp.decode(item).replace('▁', ' ').strip()
s = s[0].upper() + s[1:]
s = re.sub(r'\bi\b', 'I', s)
s = re.sub(r'[.!?]\s+(\w)',
lambda m: m.group()[:-1] + m.group()[-1].upper(), s)
out.append(s)
return out
def str2ids(self, s):
"""
Encode string s with BPEmb. BPEmb has a fixed vocabulary size, but
the model only has outputs for vocab items that are used in the
training data, so this function replaces any BPEmb ids *not* in the
training vocabulary with the model's "unknown" id.
"""
encoded = self.bp.encode(s)
ids = [self.vocab.word2id.get(item, self.vocab.unk_id) \
for item in encoded]
return ids
def test_multi_language():
text = ["This is Stratford", "Kitap okuyordu."]
bpemb_multi = BPEmb(lang="multi", add_pad_emb=True)
print(bpemb_multi.encode_ids_with_bos_eos(text))
print(
bpemb_multi.decode_ids([[1, 5496, 200, 23866, 3927, 2],
[1, 45350, 44934, 67191, 94777, 2]]))
def __init__(self,
output_dim,
vocab_size=10000,
embed_dim=50,
lang='en',
embedding_preload=True,
gpu_id=-1,
dropout=0):
super(LanguagePeripheral, self).__init__()
self.gpu_id = gpu_id
self.pad_char = vocab_size
self.bpe_encoder = BPEmb(lang=lang,
vs=vocab_size,
dim=embed_dim,
add_pad_emb=True)
# Add an extra padding character
self.embed_layer = nn.Embedding(vocab_size + 1,
embed_dim,
padding_idx=self.pad_char)
if (embedding_preload == True):
self.embed_layer.load_state_dict(
{'weight': torch.tensor(self.bpe_encoder.emb.vectors)})
print("Loading pretrained word embeddings.")
self.enc_dropout = nn.Dropout(dropout)
self.output = nn.Linear(embed_dim, output_dim)
def test_punctuation():
text = [
"Leonidas: This's Sparta!!", "Leonidas : This ' s Sparta ! !",
"Leonidas This s Sparta"
]
bpemb_multi = BPEmb(lang="multi", add_pad_emb=True)
print(bpemb_multi.encode(text))
class Hparams:
parser = argparse.ArgumentParser()
bpemb_en = BPEmb(lang="en", dim=50)
bpemb_de = BPEmb(lang='de', dim=50)
# preprocess
parser.add_argument('--BUFFER_SIZE', default=10000)
parser.add_argument('--batch_size', default=64)
parser.add_argument('--maxlen', default=40, help='max length of sentences')
parser.add_argument('--tokenizer_de',
default=bpemb_de,
help='encoding method')
parser.add_argument('--tokenizer_en',
default=bpemb_en,
help='decoding method')
# train
parser.add_argument('--num_layers',
default=4,
help='blocks number of encoder and decoder')
parser.add_argument('--d_model', default=128)
parser.add_argument('--dff', default=512)
parser.add_argument('--num_heads', default=8)
parser.add_argument('--dropout_rate', default=0.1)
parser.add_argument('--checkpoint_dir', default='./checkpoints/train')
parser.add_argument('--checkpoint_dir_de', default='./checkpoints/de_en')
parser.add_argument('--epochs', default=10)
def __init__(self, predictor_config):
predictor_config = predictor_config['vectorizer']
self.bpemb = BPEmb(lang='en',
dim=predictor_config['embedding_dim'],
vs=predictor_config['max_vocab_size'],
add_pad_emb=True)
self.max_seq_len = predictor_config['max_seq_len']
def get_embedding_vec(self, word):
if self.model is None:
self.model = BPEmb(lang="en", dim=self.dim, vs=self.bp_vocab_size)
if not self.case_sensitive:
word = word.lower()
vecs = self.model.embed(word)
return np.reshape(np.sum(vecs, axis=0), (self.dim, ))
def __init__(self, lang='ru', pretrained=True, vocab_size=100000, dim=300):
self.lang = lang
self.pretrained = pretrained
self.bpe = BPEmb(lang=self.lang,
vs=vocab_size,
dim=dim,
vs_fallback=True)
def get_transformer(ff_dim: int, n_layers: int, n_heads: int,
dropout_prob: float):
"""
Creates a new transformer and tokenizer using the given parameters
:param ff_dim:
:param n_layers:
:param n_heads:
:param dropout_prob:
:return:
"""
# Load english model with 25k word-pieces
tokenizer = BPEmb(lang='en', dim=300, vs=25000)
# Extract the embeddings and add a randomly initialized embedding for our extra [PAD] token
pretrained_embeddings = np.concatenate(
[tokenizer.emb.vectors,
np.zeros(shape=(1, 300))], axis=0)
# Extract the vocab and add an extra [PAD] token
vocabulary = tokenizer.emb.index2word + ['[PAD]']
tokenizer.pad_token_id = len(vocabulary) - 1
model = TransformerClassifier(torch.tensor(pretrained_embeddings).type(
torch.FloatTensor),
ff_dim=ff_dim,
d_model=300,
n_heads=n_heads,
n_layers=n_layers,
dropout_prob=dropout_prob).to(device)
return model, tokenizer
def get_cnn(in_channels, out_channels, kernel_heights, stride, padding, dropout_prob):
"""
Creates a new CNN and tokenizer using the given parameters
:return:
"""
# Load english model with 25k word-pieces
tokenizer = BPEmb(lang='en', dim=300, vs=25000)
# Extract the embeddings and add a randomly initialized embedding for our extra [PAD] token
pretrained_embeddings = np.concatenate([tokenizer.emb.vectors, np.zeros(shape=(1, 300))], axis=0)
# Extract the vocab and add an extra [PAD] token
vocabulary = tokenizer.emb.index2word + ['[PAD]']
tokenizer.pad_token_id = len(vocabulary) - 1
model = CNN(
torch.tensor(pretrained_embeddings).type(torch.FloatTensor),
n_labels=2,
in_channels=in_channels,
out_channels=out_channels,
kernel_heights=kernel_heights,
stride=stride,
padding=padding,
dropout=dropout_prob
).to(device)
return model, tokenizer
def __init__(self,
lang="en",
dim=200,
vs=200000,
distance_metric="cosine"):
from bpemb import BPEmb
self.bpemb = BPEmb(lang=lang, dim=dim, vs=vs)
self.distance_metric = distance_metric
def __init__(self, path=config.path_to_data, mode='train'):
self.path_to_data = path
self.mode = mode
print(f"Loading {self.mode} data...")
self.data = self.read_data()
self.preprocess_data()
self.bpemb_ru = BPEmb(lang="ru", dim=300, vs=50000)
self.placeholder = torch.zeros(config.max_seq_length, dtype=torch.long)
def __init__(
self, lang, vs=10000, dim=100, cache_dir=Path.home() / Path(".cache/bpemb")
):
self.lang = lang
self.vs = vs
self.dim = dim
self.cache_dir = cache_dir
self.module = BPEmb(lang=lang, vs=vs, dim=dim, cache_dir=cache_dir)
def load_bpe(vocab_size):
""" Load pre-trained byte pair embedding models.
Return src, trg
"""
bpemb_tr = BPEmb(lang="tr", vs=vocab_size)
bpemb_en = BPEmb(lang="en", vs=vocab_size)
return bpemb_tr, bpemb_en
def __init__(self, **kwargs):
lang = kwargs.get("lang", "en")
vs = kwargs.get("limit", 200000)
self.bpemb = BPEmb(lang=lang, vs=vs)
self.tokenizer = SpacyTokenizer(model="en",
annotators=["lemma", "pos", "ner"])
self.annotators = self.tokenizer.annotators
def test_decoding():
# Although <pad> word is added, when decoding it can't handle. Therefore, remove padding before decoding.
# Decoding removes start/end tokens.
bpemb_en = BPEmb(lang="en", add_pad_emb=True)
# ids = [1, 215, 80, 8526, 1221, 2]
ids = [[1, 215, 80, 8526, 1221, 2], [1, 215, 80, 8526, 1221, 2]]
# ids = [1, 215, 80, 8526, 1221, 2, 10000, 10000]
# print(bpemb_en.vectors[10000])
print(bpemb_en.decode_ids(ids))
def clean_sub_word_sentence(word_ids: np.array, bpemb: BPEmb):
# Extra padding token is remove in BPEmb
word_ids = word_ids - 1
try:
index = list(word_ids).index(bpemb.EOS)
words = bpemb.decode_ids(word_ids[:index])
except ValueError: # No EOS found in sequence
words = bpemb.decode_ids(word_ids)
return words
def __init__(self, config):
self._eval_data_path = os.path.join(
os.path.abspath(os.path.dirname(os.getcwd())), config["eval_data"])
self._output_path = os.path.join(
os.path.abspath(os.path.dirname(os.getcwd())),
config["output_path"])
self.bpe_zh = BPEmb(lang="zh", vs=config["vocab_size"])
self.pad_token = 0
self.eos_token = 3
def __init__(self,
component_config: Optional[Dict[Text, Any]] = None) -> None:
super().__init__(component_config)
self.model = BPEmb(
lang=self.component_config["lang"],
dim=self.component_config["dim"],
vs=self.component_config["vs"],
vs_fallback=self.component_config["vs_fallback"],
cache_dir=self.component_config["cache_dir"],
)
def __init__(self, embed_size, output_size, enc_hidden_size):
super(TopicCEncSimpleBPemb, self).__init__()
print("init: TopicCEncSimpleBPemb model")
self.embedding_model = BPEmb(dim=embed_size, lang="en", vs=100000)
self.encoder = nn.GRU(input_size=embed_size,
hidden_size=enc_hidden_size,
num_layers=1,
bidirectional=True)
self.seq_to_output_map = nn.Linear(2 * enc_hidden_size,
output_size,
bias=False)
def process(texts, vocab_size=25000, dim=300):
emb = BPEmb(lang='de', vs=vocab_size, dim=dim)
texts = [emb.encode(t) for t in texts]
unique_words = set([w for t in texts for w in t])
vecs = [
wv for (i, wv) in enumerate(zip(emb.words, emb.vectors))
if i < 3 or wv[0] in unique_words
] # reserve the special tokens
return texts, vecs
def __init__(self, conf, lang, bert=None):
self.conf = conf
self.lang = lang
self.bert = bert
self.device = torch.device(f"cuda:{conf.gpu_id}")
self.name = conf.dataset
self.tag = conf.tag
self.batch_size = conf.batch_size
self.eval_batch_size = conf.eval_batch_size
self.examples_to_print = conf.n_examples
if self.conf.tag_scheme:
self.convert_tags = iob_to[self.tag_scheme]
self.load_data_raw()
self.NO_TAG = "NO_TAG"
tags = self.get_tags()
print(Counter(tags).most_common())
shapes = self.get_shapes()
char_enc = None
if conf.char_enc_file:
assert Path(conf.char_enc_file).exists()
char_enc = joblib.load(conf.char_enc_file)
if self.name.endswith("multi_finetune"):
assert char_enc
if char_enc:
self.char_enc = char_enc
else:
chars = self.get_chars()
self.char_enc = LabelEncoder(
to_torch=True, device=self.device).fit(chars)
tag_enc = None
if conf.tag_enc_file:
assert Path(conf.tag_enc_file).exists()
tag_enc = joblib.load(conf.tag_enc_file)
if tag_enc:
self.tag_enc = tag_enc
else:
self.tag_enc = LabelEncoder(
to_torch=True, device=self.device).fit(tags)
self.shape_enc = LabelEncoder(
to_torch=True, device=self.device).fit(shapes)
self.bpemb = BPEmb(
lang=conf.bpemb_lang,
vs=conf.vocab_size,
dim=conf.bpemb_dim,
add_pad_emb=True)
if conf.use_fasttext:
f = conf.fasttext_emb_file.format(dataset=self.name, lang=lang)
self.fasttext_emb = load_word2vec_file(f, add_unk=True)
self.pad_idx = self.bpemb.emb.key_to_index["<pad>"]
if not conf.no_dataset_tensorize:
self.tensorize()
def __init__(
self,
config: Dict[Text, Any],
name: Text,
) -> None:
"""Constructs a new byte pair vectorizer."""
super().__init__(name, config)
# The configuration dictionary is saved in `self._config` for reference.
self.model = BPEmb(
lang=self._config["lang"],
dim=self._config["dim"],
vs=self._config["vs"],
vs_fallback=self._config["vs_fallback"],
)
def get_multibpe_embeddings(x: List[str],
multibpemb=None,
vs=1000000,
dim=300):
if multibpemb is None:
multibpemb = BPEmb(lang="multi", vs=vs, dim=dim)
embeddings = []
for sentence in x:
features = multibpemb.embed(sentence)
embeddings.append(features)
embeddings = pad(embeddings, [0 for _ in range(dim)], 32)
return embeddings
def __init__(self, lang: str, dim: int = 300, vs: int = 100000, add_pad_emb: bool = True):
super().__init__()
try:
from bpemb import BPEmb
self.embedder = BPEmb(lang=lang, dim=dim, vs=vs, add_pad_emb=add_pad_emb, cache_dir=Path(aikido.cache_root) / "embeddings")
self.embeddings_ = nn.Embedding.from_pretrained(tensor(self.embedder.vectors, dtype=torch.float),
padding_idx=vs)
self.dim_ = dim
self.vs_ = vs
except ImportError:
logging.error("-" * 100)
logging.error("no bpemb installation found. see https://github.com/bheinzerling/bpemb")
logging.error("-" * 100)
pass
def test():
bpemb_en = BPEmb(lang="en", dim=100)
s = "Stratford"
res1 = bpemb_en.encode(s)
res2 = bpemb_en.encode_ids(s)
print(res1)
print(res2)
bpemb_en_100k = BPEmb(lang="en", vs=100000, dim=100) # 40 M；词表越大切分越少
s = "hello world !"
bpemb_en_100k.encode_ids(s)
res1 = bpemb_en_100k.encode(s)
res2 = bpemb_en_100k.encode_ids(s)
print(res1)
print(res2)
def make_byte_pair(corpus):
'''This function implements byte-pair encodings'''
# the bpe model
bpemb_en = BPEmb(lang="en")
# we are using the method to remove the stopwords so that the memory usage gets low
tokenized_corpus = tokenize_preprocess_corpus(corpus)
documents = []
for word_tokens in tokenized_corpus:
sentence = ' '.join(word_tokens)
documents.append(bpemb_en.encode(sentence))
return documents
class TweetTokenizer():
def __init__(self, dim=50, vocab_size=10000, mode='get_id'):
self.dim = dim
self.vocab_size = vocab_size
self.bpemb_en = BPEmb(lang="en", dim=dim, vs=vocab_size)
self.embedding_weight = self.bpemb_en.vectors
self.mode = mode
def __call__(self, tweet, mode='get_id'):
if mode == 'get_id':
return torch.tensor(self.bpemb_en.encode_ids(tweet), dtype=torch.long)
elif mode == 'raw':
return self.bpemb_en.encode(tweet)
else:
raise ValueError('Invalid mode')
