def CDLM_ner(list_of_words_for_a_sentence,
_tokenizer,
is_zh,
keep_origin_rate=0.2,
max_ratio=0.2,
max_num=4):
"""
:params
list_of_words_for_a_sentence (list): ['I', 'am', 'a', 'student']
tokenizer (object): tfds tokenizer object
lan_index (int): index for language embeddings, could be 0 or 1
min_num (int):
max_num (int):
max_ratio (float):
keep_origin_rate (float):
language (str): zh or en or both
:returns
masked_input (list): list of encoded and masked token idx
list_of_tar_token_idx (list):
list_of_lan_idx (list):
"""
# get n grams
list_of_token = list(
map(lambda x: x.strip(), list_of_words_for_a_sentence[:-1]))
list_of_2_gram = map_dict.n_grams(list_of_token, 2)
list_of_3_gram = map_dict.n_grams(list_of_token, 3)
list_of_4_gram = map_dict.n_grams(list_of_token, 4)
# map dictionary
map_word = map_dict.zh_word if is_zh else map_dict.en_word
map_phrase = map_dict.zh_phrase if is_zh else map_dict.en_phrase
info_key = 'translation'
list_of_info_for_word = list(
map(lambda x: map_word(x, info_key), list_of_token))
list_of_info_for_2_gram = list(
map(lambda x: map_phrase(x, info_key), list_of_2_gram))
list_of_info_for_3_gram = list(
map(lambda x: map_phrase(x, info_key), list_of_3_gram))
list_of_info_for_4_gram = list(
map(lambda x: map_phrase(x, info_key), list_of_4_gram))
# find the position that the corresponding word can be mapped with dictionary
map_word_pos = map_dict.map_pos(list_of_info_for_word, 1)
map_2_gram_pos = map_dict.map_pos(list_of_info_for_2_gram, 2)
map_3_gram_pos = map_dict.map_pos(list_of_info_for_3_gram, 3)
map_4_gram_pos = map_dict.map_pos(list_of_info_for_4_gram, 4)
# if no map with dictionary
if not map_word_pos and not map_2_gram_pos and not map_3_gram_pos and not map_4_gram_pos:
return [], [], [], [], []
# BPE for each word
list_of_list_token_idx = list(
map(lambda x: _tokenizer.encode(x), list_of_words_for_a_sentence))
# get all words or phrases that can be mapped with dictionary
if map_2_gram_pos or map_3_gram_pos or map_4_gram_pos:
samples_to_be_selected = map_dict.merge_conflict_samples(
len(list_of_words_for_a_sentence), map_4_gram_pos, map_3_gram_pos,
map_2_gram_pos)
else:
samples_to_be_selected = map_dict.merge_conflict_samples(
len(list_of_words_for_a_sentence), map_4_gram_pos, map_3_gram_pos,
map_2_gram_pos, map_word_pos)
mode = random.random()
mode = 0 if mode <= ratio_mode_0 else (1 if mode <= ratio_mode_0_1 else 2)
# only sample one word or phrase that can be mapped with dictionary
sample = random.sample(samples_to_be_selected, 1)[0]
samples = random.sample(
samples_to_be_selected,
random.randint(
1,
max(
min(max_num, len(samples_to_be_selected),
int(len(list_of_words_for_a_sentence) * max_ratio)), 1)))
samples.sort()
samples_start, samples_end = list(zip(*samples))
# get token index
mask_idx = _tokenizer.vocab_size + Ids.mask
sep_idx = _tokenizer.vocab_size + Ids.sep
src_lan_idx = LanIds.zh if is_zh else LanIds.en
tar_lan_idx = LanIds.en if is_zh else LanIds.zh
_input = []
_lan_input = []
_output = []
_lan_output = []
_soft_pos_output = []
# for mode 0, we only need one sample
offset = _tokenizer.vocab_size + Ids.offset_ner
ner_ids = get_ner_ids(sample, offset, list_of_list_token_idx)
# for mode 1 and 2, we would need multiple samples
ner_ids_list = [
get_ner_ids(_sample, offset, list_of_list_token_idx)
for _sample in samples
]
if not ner_ids and not ner_ids_list:
return [], [], [], [], []
# mode = random.random()
# mode = 0 if mode <= ratio_mode_0 else (1 if mode <= ratio_mode_0_1 else 2)
# mode = random.randint(0, 2)
start = _tokenizer.vocab_size + Ids.start_nmt
end = _tokenizer.vocab_size + Ids.end_nmt
# replace the masked word with <mask>, and
# let the ground truth be its corresponding NER
if mode == 0:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index == sample[0]:
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(sample[0], sample[1])
])
pos_for_mask = [len(_input), len(_input) + len_tokens]
if random.random() < keep_origin_rate:
_input += reduce(
lambda a, b: a + b,
list_of_list_token_idx[sample[0]:sample[1]])
else:
_input += [mask_idx] * len_tokens
_lan_input += [tar_lan_idx] * len_tokens
index = sample[1]
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# translations_ids.sort()
# new_translations_ids = list(map(lambda x: [sep_idx] + x, translations_ids[:3]))
# get token idxs for output
_output = ner_ids
# get language index for output
_lan_output = [LanIds.NER] * len(_output)
# get soft position for output
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
_soft_pos_output = list(
map(lambda a: int(round(a)),
np.linspace(pos_for_mask[0], pos_for_mask[1], len(_output))))
# _soft_pos_output = list(map(
# lambda x: list(map(lambda a: int(round(a)), np.linspace(pos_for_mask[0], pos_for_mask[1], len(x)))),
# new_translations_ids
# ))
# _soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
# _soft_pos_output[1] = _soft_pos_output[0]
# _soft_pos_output.pop(0)
start = _tokenizer.vocab_size + Ids.start_cdlm_ner_0
end = _tokenizer.vocab_size + Ids.end_cdlm_ner_0
# replace the masked word with <mask>, and
# let the ground truth be the original word
if mode == 1:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index in samples_start:
sample_idx = samples_start.index(index)
sample_end = samples_end[sample_idx]
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(index, sample_end)
])
pos_for_mask.append([len(_input), len(_input) + len_tokens])
if random.random() < keep_origin_rate:
_input += reduce(lambda a, b: a + b,
list_of_list_token_idx[index:sample_end])
else:
_input += [mask_idx] * len_tokens
_lan_input += [src_lan_idx] * len_tokens
index = sample_end
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# get token idxs for output
_output = [[
list_of_list_token_idx[i] for i in range(_sample[0], _sample[1])
] for _sample in samples]
_output = reduce(lambda a, b: a + b, _output)
_output = reduce(lambda a, b: a + b, _output)
# get language index for output
_lan_output = [src_lan_idx] * len(_output)
# get soft position for output
_soft_pos_output = [
list(range(_pos[0], _pos[1])) for _pos in pos_for_mask
]
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
start = _tokenizer.vocab_size + Ids.start_mlm
end = _tokenizer.vocab_size + Ids.end_mlm
# replace the masked word with its ner, and let the ground truth be its original word
elif mode == 2:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index in samples_start:
sample_idx = samples_start.index(index)
sample_end = samples_end[sample_idx]
_pos = [len(_input)]
_input += ner_ids_list[sample_idx]
_pos.append(len(_input))
pos_for_mask.append(_pos)
_lan_input += [LanIds.NER] * len(ner_ids_list[sample_idx])
index = sample_end
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# get token idxs for output
_output = [[
list_of_list_token_idx[i] for i in range(_sample[0], _sample[1])
] for _sample in samples]
_soft_pos_output = [
list(
map(
lambda a: int(round(a)),
np.linspace(_pos[0], _pos[1],
len(reduce(lambda a, b: a + b, _output[i])))))
for i, _pos in enumerate(pos_for_mask)
]
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
# _soft_pos_output = list(map(lambda a: int(round(a)), _soft_pos_output))
_output = reduce(lambda a, b: a + b, _output)
_output = reduce(lambda a, b: a + b, _output)
# get language index for output
_lan_output = [src_lan_idx] * len(_output)
# get soft position for output
# _soft_pos_output =
# _soft_pos_output = list(
# map(lambda a: int(round(a)), np.linspace(pos_for_mask[0], pos_for_mask[1], len(_output))))
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
start = _tokenizer.vocab_size + Ids.start_cdlm_ner_2
end = _tokenizer.vocab_size + Ids.end_cdlm_ner_2
# replace the masked word with its ner, let the ground truth be the tag of the source sequence;
# the tag value is 0, 1; 0 indicates it is not replaced word, 1 indicates it is a replaced word
# elif mode == 3:
# pass
# add <start> <end> token
_input = [start] + _input + [end]
_output = [start] + _output + [end]
_lan_input = _lan_input[:1] + _lan_input + _lan_input[-1:]
_lan_output = _lan_output[:1] + _lan_output + _lan_output[-1:]
_soft_pos_output = _soft_pos_output[:
1] + _soft_pos_output + _soft_pos_output[
-1:]
return _input, _output, _lan_input, _lan_output, _soft_pos_output
def CDLM_translation(list_of_words_for_a_sentence,
_tokenizer,
is_zh,
keep_origin_rate=0.2):
"""
:params
list_of_words_for_a_sentence (list): ['I', 'am', 'a', 'student']
tokenizer (object): tfds tokenizer object
lan_index (int): index for language embeddings, could be 0 or 1
min_num (int):
max_num (int):
max_ratio (float):
keep_origin_rate (float):
language (str): zh or en or both
:returns
masked_input (list): list of encoded and masked token idx
list_of_tar_token_idx (list):
list_of_lan_idx (list):
"""
# get n grams
list_of_token = list(
map(lambda x: x.strip(), list_of_words_for_a_sentence[:-1]))
list_of_2_gram = map_dict.n_grams(list_of_token, 2)
list_of_3_gram = map_dict.n_grams(list_of_token, 3)
list_of_4_gram = map_dict.n_grams(list_of_token, 4)
# map dictionary
map_word = map_dict.zh_word if is_zh else map_dict.en_word
map_phrase = map_dict.zh_phrase if is_zh else map_dict.en_phrase
info_key = 'translation'
list_of_info_for_word = list(
map(lambda x: map_word(x, info_key), list_of_token))
list_of_info_for_2_gram = list(
map(lambda x: map_phrase(x, info_key), list_of_2_gram))
list_of_info_for_3_gram = list(
map(lambda x: map_phrase(x, info_key), list_of_3_gram))
list_of_info_for_4_gram = list(
map(lambda x: map_phrase(x, info_key), list_of_4_gram))
# find the position that the corresponding word can be mapped with dictionary
map_word_pos = map_dict.map_pos(list_of_info_for_word, 1)
map_2_gram_pos = map_dict.map_pos(list_of_info_for_2_gram, 2)
map_3_gram_pos = map_dict.map_pos(list_of_info_for_3_gram, 3)
map_4_gram_pos = map_dict.map_pos(list_of_info_for_4_gram, 4)
# if no map with dictionary
if not map_word_pos and not map_2_gram_pos and not map_3_gram_pos and not map_4_gram_pos:
return [], [], [], [], []
# BPE for each word
list_of_list_token_idx = list(
map(lambda x: _tokenizer.encode(x), list_of_words_for_a_sentence))
# get all words or phrases that can be mapped with dictionary
samples_to_be_selected = map_dict.merge_conflict_samples(
len(list_of_words_for_a_sentence), map_4_gram_pos, map_3_gram_pos,
map_2_gram_pos, map_word_pos)
# only sample one word or phrase that can be mapped with dictionary
sample = random.sample(samples_to_be_selected, 1)[0]
# get token index
mask_idx = _tokenizer.vocab_size + Ids.mask
sep_idx = _tokenizer.vocab_size + Ids.sep
src_lan_idx = LanIds.zh if is_zh else LanIds.en
tar_lan_idx = LanIds.en if is_zh else LanIds.zh
_input = []
_lan_input = []
_output = []
_lan_output = []
_soft_pos_output = []
n = sample[1] - sample[0]
if n == 4:
translations = list_of_info_for_4_gram[sample[0]]
elif n == 3:
translations = list_of_info_for_3_gram[sample[0]]
elif n == 2:
translations = list_of_info_for_2_gram[sample[0]]
else:
translations = list_of_info_for_word[sample[0]]
translations = list(
filter(lambda x: x != list_of_words_for_a_sentence[sample[0]],
translations))
# filter some noise of the translations
translations = list(filter(lambda x: x, translations))
if is_zh:
translations = list(
filter(lambda x: (x[0] != '-' or x[-1] != '-') and len(x) > 1,
translations))
if len(translations) >= 8:
tmp_translations = list(filter(lambda x: len(x) >= 5,
translations))
if tmp_translations:
translations = tmp_translations
if not translations:
return [], [], [], [], []
# apply BPE for the translations
translations_ids = list(
map(lambda x: _tokenizer.encode(x + ' '), translations))
mode = random.random()
mode = 0 if mode <= ratio_mode_0 else (1 if mode <= ratio_mode_0_1 else 2)
# mode = random.randint(0, 2)
start = _tokenizer.vocab_size + Ids.start_nmt
end = _tokenizer.vocab_size + Ids.end_nmt
# replace the masked word with <mask>, and
# let the ground truth be its corresponding translation
if mode == 0:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index == sample[0]:
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(sample[0], sample[1])
])
pos_for_mask = [len(_input), len(_input) + len_tokens]
if random.random() < keep_origin_rate:
_input += reduce(
lambda a, b: a + b,
list_of_list_token_idx[sample[0]:sample[1]])
else:
_input += [mask_idx] * len_tokens
_lan_input += [tar_lan_idx] * len_tokens
index = sample[1]
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
translations_ids.sort()
new_translations_ids = list(
map(lambda x: [sep_idx] + x, translations_ids[:3]))
# get token idxs for output
_output = reduce(lambda a, b: a + b, new_translations_ids)
_output.pop(0)
# get language index for output
_lan_output = [tar_lan_idx] * len(_output)
# get soft position for output
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
_soft_pos_output = list(
map(
lambda x: list(
map(lambda a: int(round(a)),
np.linspace(pos_for_mask[0], pos_for_mask[1], len(x)))
), new_translations_ids))
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
# _soft_pos_output[1] = _soft_pos_output[0]
# _soft_pos_output.pop(0)
start = _tokenizer.vocab_size + Ids.start_cdlm_t_0
end = _tokenizer.vocab_size + Ids.end_cdlm_t_0
# replace the masked word with <mask>, and
# let the ground truth be the original word
if mode == 1:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index == sample[0]:
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(sample[0], sample[1])
])
pos_for_mask = [len(_input), len(_input) + len_tokens]
if random.random() < keep_origin_rate:
_input += reduce(
lambda a, b: a + b,
list_of_list_token_idx[sample[0]:sample[1]])
else:
_input += [mask_idx] * len_tokens
_lan_input += [src_lan_idx] * len_tokens
index = sample[1]
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# get token idxs for output
_output = [
list_of_list_token_idx[i] for i in range(sample[0], sample[1])
]
_output = reduce(lambda a, b: a + b, _output)
# get language index for output
_lan_output = [src_lan_idx] * len(_output)
# get soft position for output
_soft_pos_output = list(range(*pos_for_mask))
start = _tokenizer.vocab_size + Ids.start_mlm
end = _tokenizer.vocab_size + Ids.end_mlm
# replace the masked word with its translation, and let the ground truth be its original word
elif mode == 2:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index == sample[0]:
pos_for_mask = [len(_input)]
tmp_input = random.sample(translations_ids, 1)[0]
_input += tmp_input
pos_for_mask.append(len(_input))
_lan_input += [tar_lan_idx] * len(tmp_input)
index = sample[1]
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# get token idxs for output
_output = [
list_of_list_token_idx[i] for i in range(sample[0], sample[1])
]
_output = reduce(lambda a, b: a + b, _output)
# get language index for output
_lan_output = [src_lan_idx] * len(_output)
# get soft position for output
_soft_pos_output = list(
map(lambda a: int(round(a)),
np.linspace(pos_for_mask[0], pos_for_mask[1], len(_output))))
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
start = _tokenizer.vocab_size + Ids.start_cdlm_t_2
end = _tokenizer.vocab_size + Ids.end_cdlm_t_2
# replace the masked word with its translation, let the ground truth be the tag of the source sequence;
# the tag value is 0, 1; 0 indicates it is not replaced word, 1 indicates it is a replaced word
# elif mode == 3:
# pass
# add <start> <end> token
_input = [start] + _input + [end]
_output = [start] + _output + [end]
_lan_input = _lan_input[:1] + _lan_input + _lan_input[-1:]
_lan_output = _lan_output[:1] + _lan_output + _lan_output[-1:]
_soft_pos_output = _soft_pos_output[:
1] + _soft_pos_output + _soft_pos_output[
-1:]
return _input, _output, _lan_input, _lan_output, _soft_pos_output
def CDLM_definition(list_of_words_for_a_sentence,
_tokenizer,
is_zh,
keep_origin_rate=0.2,
max_ratio=0.2,
max_num=4):
"""
:params
list_of_words_for_a_sentence (list): ['I', 'am', 'a', 'student']
tokenizer (object): tfds tokenizer object
lan_index (int): index for language embeddings, could be 0 or 1
min_num (int):
max_num (int):
max_ratio (float):
keep_origin_rate (float):
language (str): zh or en or both
:returns
masked_input (list): list of encoded and masked token idx
list_of_tar_token_idx (list):
list_of_lan_idx (list):
"""
# get n grams
list_of_token = list(
map(lambda x: x.strip(), list_of_words_for_a_sentence[:-1]))
list_of_2_gram = map_dict.n_grams(list_of_token, 2)
list_of_3_gram = map_dict.n_grams(list_of_token, 3)
list_of_4_gram = map_dict.n_grams(list_of_token, 4)
# map dictionary
map_word = map_dict.zh_word if is_zh else map_dict.en_word
map_phrase = map_dict.zh_phrase if is_zh else map_dict.en_phrase
info_key = 'src_meanings'
list_of_info_for_word_src = list(
map(lambda x: map_word(x, info_key), list_of_token))
list_of_info_for_2_gram_src = list(
map(lambda x: map_phrase(x, info_key), list_of_2_gram))
list_of_info_for_3_gram_src = list(
map(lambda x: map_phrase(x, info_key), list_of_3_gram))
list_of_info_for_4_gram_src = list(
map(lambda x: map_phrase(x, info_key), list_of_4_gram))
info_key = 'tar_meanings'
list_of_info_for_word_tar = list(
map(lambda x: map_word(x, info_key), list_of_token))
list_of_info_for_2_gram_tar = list(
map(lambda x: map_phrase(x, info_key), list_of_2_gram))
list_of_info_for_3_gram_tar = list(
map(lambda x: map_phrase(x, info_key), list_of_3_gram))
list_of_info_for_4_gram_tar = list(
map(lambda x: map_phrase(x, info_key), list_of_4_gram))
# find the position that the corresponding word can be mapped with dictionary
map_word_pos_src = map_dict.map_pos(list_of_info_for_word_src, 1)
map_2_gram_pos_src = map_dict.map_pos(list_of_info_for_2_gram_src, 2)
map_3_gram_pos_src = map_dict.map_pos(list_of_info_for_3_gram_src, 3)
map_4_gram_pos_src = map_dict.map_pos(list_of_info_for_4_gram_src, 4)
map_word_pos_tar = map_dict.map_pos(list_of_info_for_word_tar, 1)
map_2_gram_pos_tar = map_dict.map_pos(list_of_info_for_2_gram_tar, 2)
map_3_gram_pos_tar = map_dict.map_pos(list_of_info_for_3_gram_tar, 3)
map_4_gram_pos_tar = map_dict.map_pos(list_of_info_for_4_gram_tar, 4)
no_src_syn = not map_word_pos_src and not map_2_gram_pos_src and not map_3_gram_pos_src and not map_4_gram_pos_src
no_tar_syn = not map_word_pos_tar and not map_2_gram_pos_tar and not map_3_gram_pos_tar and not map_4_gram_pos_tar
if no_src_syn and no_tar_syn:
return [], [], [], [], []
if no_src_syn:
use_tar = True
elif no_tar_syn:
use_tar = False
else:
use_tar = True if random.random() <= 0.5 else False
list_of_info_for_word = list_of_info_for_word_tar if use_tar else list_of_info_for_word_src
list_of_info_for_2_gram = list_of_info_for_2_gram_tar if use_tar else list_of_info_for_2_gram_src
list_of_info_for_3_gram = list_of_info_for_3_gram_tar if use_tar else list_of_info_for_3_gram_src
list_of_info_for_4_gram = list_of_info_for_4_gram_tar if use_tar else list_of_info_for_4_gram_src
map_word_pos = map_word_pos_tar if use_tar else map_word_pos_src
map_2_gram_pos = map_2_gram_pos_tar if use_tar else map_2_gram_pos_src
map_3_gram_pos = map_3_gram_pos_tar if use_tar else map_3_gram_pos_src
map_4_gram_pos = map_4_gram_pos_tar if use_tar else map_4_gram_pos_src
# BPE for each word
list_of_list_token_idx = list(
map(lambda x: _tokenizer.encode(x), list_of_words_for_a_sentence))
# get all words or phrases that can be mapped with dictionary
samples_to_be_selected = map_dict.merge_conflict_samples(
len(list_of_words_for_a_sentence), map_4_gram_pos, map_3_gram_pos,
map_2_gram_pos, map_word_pos)
# only sample one word or phrase that can be mapped with dictionary
sample = random.sample(samples_to_be_selected, 1)[0]
# get token index
mask_idx = _tokenizer.vocab_size + Ids.mask
sep_idx = _tokenizer.vocab_size + Ids.sep
src_lan_idx = LanIds.zh if is_zh else LanIds.en
tar_lan_idx = LanIds.en if is_zh else LanIds.zh
lan_idx = tar_lan_idx if use_tar else src_lan_idx
_input = []
_lan_input = []
_output = []
_lan_output = []
_soft_pos_output = []
# for mode 0, we only need one sample
definitions = get_definitions(sample, list_of_info_for_4_gram,
list_of_info_for_3_gram,
list_of_info_for_2_gram,
list_of_info_for_word,
list_of_words_for_a_sentence, is_zh)
if not definitions:
return [], [], [], [], []
# apply BPE for the definitions
definitions_ids = list(
map(lambda x: _tokenizer.encode(x + ' '), definitions))
# replace the masked word with <mask>, and
# let the ground truth be its corresponding definition
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index == sample[0]:
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(sample[0], sample[1])
])
pos_for_mask = [len(_input), len(_input) + len_tokens]
if random.random() < keep_origin_rate:
_input += reduce(lambda a, b: a + b,
list_of_list_token_idx[sample[0]:sample[1]])
else:
_input += [mask_idx] * len_tokens
_lan_input += [tar_lan_idx] * len_tokens
index = sample[1]
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
definitions_ids.sort()
definitions_ids = list(map(lambda x: [sep_idx] + x, definitions_ids[:2]))
new_definitions_ids = copy.deepcopy(definitions_ids)
# get token idxs for output
_output = reduce(lambda a, b: a + b, new_definitions_ids)
_output.pop(0)
# get language index for output
_lan_output = [lan_idx] * len(_output)
# get soft position for output
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
_soft_pos_output = list(
map(
lambda x: list(
map(lambda a: int(round(a)),
np.linspace(pos_for_mask[0], pos_for_mask[1], len(x)))),
definitions_ids))
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
_soft_pos_output[1] = _soft_pos_output[0]
_soft_pos_output.pop(0)
start = _tokenizer.vocab_size + Ids.start_cdlm_def
end = _tokenizer.vocab_size + Ids.end_cdlm_def
# replace the masked word with its definition, let the ground truth be the tag of the source sequence;
# the tag value is 0, 1; 0 indicates it is not replaced word, 1 indicates it is a replaced word
# elif mode == 3:
# pass
# add <start> <end> token
_input = [start] + _input + [end]
_output = [start] + _output + [end]
_lan_input = _lan_input[:1] + _lan_input + _lan_input[-1:]
_lan_output = _lan_output[:1] + _lan_output + _lan_output[-1:]
_soft_pos_output = _soft_pos_output[:
1] + _soft_pos_output + _soft_pos_output[
-1:]
return _input, _output, _lan_input, _lan_output, _soft_pos_output
def CDLM_synonym(list_of_words_for_a_sentence,
_tokenizer,
is_zh,
keep_origin_rate=0.2,
max_ratio=0.2,
max_num=4):
"""
:params
list_of_words_for_a_sentence (list): ['I', 'am', 'a', 'student']
tokenizer (object): tfds tokenizer object
lan_index (int): index for language embeddings, could be 0 or 1
min_num (int):
max_num (int):
max_ratio (float):
keep_origin_rate (float):
language (str): zh or en or both
:returns
masked_input (list): list of encoded and masked token idx
list_of_tar_token_idx (list):
list_of_lan_idx (list):
"""
# get n grams
list_of_token = list(
map(lambda x: x.strip(), list_of_words_for_a_sentence[:-1]))
list_of_2_gram = map_dict.n_grams(list_of_token, 2)
list_of_3_gram = map_dict.n_grams(list_of_token, 3)
list_of_4_gram = map_dict.n_grams(list_of_token, 4)
# map dictionary
map_word = map_dict.zh_word if is_zh else map_dict.en_word
map_phrase = map_dict.zh_phrase if is_zh else map_dict.en_phrase
info_key = 'src_synonyms'
list_of_info_for_word_src = list(
map(lambda x: map_word(x, info_key), list_of_token))
list_of_info_for_2_gram_src = list(
map(lambda x: map_phrase(x, info_key), list_of_2_gram))
list_of_info_for_3_gram_src = list(
map(lambda x: map_phrase(x, info_key), list_of_3_gram))
list_of_info_for_4_gram_src = list(
map(lambda x: map_phrase(x, info_key), list_of_4_gram))
info_key = 'tar_synonyms'
list_of_info_for_word_tar = list(
map(lambda x: map_word(x, info_key), list_of_token))
list_of_info_for_2_gram_tar = list(
map(lambda x: map_phrase(x, info_key), list_of_2_gram))
list_of_info_for_3_gram_tar = list(
map(lambda x: map_phrase(x, info_key), list_of_3_gram))
list_of_info_for_4_gram_tar = list(
map(lambda x: map_phrase(x, info_key), list_of_4_gram))
# find the position that the corresponding word can be mapped with dictionary
map_word_pos_src = map_dict.map_pos(list_of_info_for_word_src, 1)
map_2_gram_pos_src = map_dict.map_pos(list_of_info_for_2_gram_src, 2)
map_3_gram_pos_src = map_dict.map_pos(list_of_info_for_3_gram_src, 3)
map_4_gram_pos_src = map_dict.map_pos(list_of_info_for_4_gram_src, 4)
map_word_pos_tar = map_dict.map_pos(list_of_info_for_word_tar, 1)
map_2_gram_pos_tar = map_dict.map_pos(list_of_info_for_2_gram_tar, 2)
map_3_gram_pos_tar = map_dict.map_pos(list_of_info_for_3_gram_tar, 3)
map_4_gram_pos_tar = map_dict.map_pos(list_of_info_for_4_gram_tar, 4)
no_src_syn = not map_word_pos_src and not map_2_gram_pos_src and not map_3_gram_pos_src and not map_4_gram_pos_src
no_tar_syn = not map_word_pos_tar and not map_2_gram_pos_tar and not map_3_gram_pos_tar and not map_4_gram_pos_tar
if no_src_syn and no_tar_syn:
return [], [], [], [], []
if no_src_syn:
use_tar = True
elif no_tar_syn:
use_tar = False
else:
use_tar = True if random.random() <= 0.5 else False
list_of_info_for_word = list_of_info_for_word_tar if use_tar else list_of_info_for_word_src
list_of_info_for_2_gram = list_of_info_for_2_gram_tar if use_tar else list_of_info_for_2_gram_src
list_of_info_for_3_gram = list_of_info_for_3_gram_tar if use_tar else list_of_info_for_3_gram_src
list_of_info_for_4_gram = list_of_info_for_4_gram_tar if use_tar else list_of_info_for_4_gram_src
map_word_pos = map_word_pos_tar if use_tar else map_word_pos_src
map_2_gram_pos = map_2_gram_pos_tar if use_tar else map_2_gram_pos_src
map_3_gram_pos = map_3_gram_pos_tar if use_tar else map_3_gram_pos_src
map_4_gram_pos = map_4_gram_pos_tar if use_tar else map_4_gram_pos_src
# BPE for each word
list_of_list_token_idx = list(
map(lambda x: _tokenizer.encode(x), list_of_words_for_a_sentence))
# get all words or phrases that can be mapped with dictionary
samples_to_be_selected = map_dict.merge_conflict_samples(
len(list_of_words_for_a_sentence), map_4_gram_pos, map_3_gram_pos,
map_2_gram_pos, map_word_pos)
mode = random.random()
mode = 0 if mode <= ratio_mode_0 else (1 if mode <= ratio_mode_0_1 else 2)
# only sample one word or phrase that can be mapped with dictionary
sample = random.sample(samples_to_be_selected, 1)[0]
samples = random.sample(
samples_to_be_selected,
random.randint(
1,
max(
min(max_num, len(samples_to_be_selected),
int(len(list_of_words_for_a_sentence) * max_ratio)), 1)))
samples.sort()
# get token index
mask_idx = _tokenizer.vocab_size + Ids.mask
sep_idx = _tokenizer.vocab_size + Ids.sep
src_lan_idx = LanIds.zh if is_zh else LanIds.en
tar_lan_idx = LanIds.en if is_zh else LanIds.zh
lan_idx = tar_lan_idx if use_tar else src_lan_idx
_input = []
_lan_input = []
_output = []
_lan_output = []
_soft_pos_output = []
# for mode 0, we only need one sample
synonyms = get_synonyms(sample, list_of_info_for_4_gram,
list_of_info_for_3_gram, list_of_info_for_2_gram,
list_of_info_for_word,
list_of_words_for_a_sentence, is_zh)
# for mode 1 and 2, we would need multiple samples
synonyms_list = [
get_synonyms(_sample, list_of_info_for_4_gram, list_of_info_for_3_gram,
list_of_info_for_2_gram, list_of_info_for_word,
list_of_words_for_a_sentence, is_zh)
for _sample in samples
]
# remove those do not have synonym info samples after filtering
delete_samples = []
for i, v in enumerate(synonyms_list):
if not v:
delete_samples.append(i)
delete_samples.sort(reverse=True)
for k in delete_samples:
del synonyms_list[k]
del samples[k]
if not synonyms and not synonyms_list:
return [], [], [], [], []
if samples:
samples_start, samples_end = list(zip(*samples))
else:
samples_start = samples_end = []
# apply BPE for the synonyms
synonyms_ids = list(map(lambda x: _tokenizer.encode(x + ' '), synonyms))
synonyms_ids_list = list(
map(
lambda _synonyms: list(
map(lambda x: _tokenizer.encode(x + ' '), _synonyms)),
synonyms_list))
if not synonyms_list and synonyms:
mode = 0
elif not synonyms:
mode = random.random()
if mode < (ratio_mode_1 / (ratio_mode_1 + ratio_mode_2)):
mode = 1
else:
mode = 2
# mode = random.random()
# mode = 0 if mode <= ratio_mode_0 else (1 if mode <= ratio_mode_0_1 else 2)
# mode = random.randint(0, 2)
start = _tokenizer.vocab_size + Ids.start_nmt
end = _tokenizer.vocab_size + Ids.end_nmt
# replace the masked word with <mask>, and
# let the ground truth be its corresponding synonym
if mode == 0:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index == sample[0]:
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(sample[0], sample[1])
])
pos_for_mask = [len(_input), len(_input) + len_tokens]
if random.random() < keep_origin_rate:
_input += reduce(
lambda a, b: a + b,
list_of_list_token_idx[sample[0]:sample[1]])
else:
_input += [mask_idx] * len_tokens
_lan_input += [tar_lan_idx] * len_tokens
index = sample[1]
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
synonyms_ids.sort()
synonyms_ids = list(map(lambda x: [sep_idx] + x, synonyms_ids[:3]))
new_synonyms_ids = copy.deepcopy(synonyms_ids)
# get token idxs for output
_output = reduce(lambda a, b: a + b, new_synonyms_ids)
_output.pop(0)
# get language index for output
_lan_output = [lan_idx] * len(_output)
# get soft position for output
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
_soft_pos_output = list(
map(
lambda x: list(
map(lambda a: int(round(a)),
np.linspace(pos_for_mask[0], pos_for_mask[1], len(x)))
), synonyms_ids))
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
_soft_pos_output[1] = _soft_pos_output[0]
_soft_pos_output.pop(0)
start = _tokenizer.vocab_size + Ids.start_cdlm_synonym_0
end = _tokenizer.vocab_size + Ids.end_cdlm_synonym_0
# replace the masked word with <mask>, and
# let the ground truth be the original word
if mode == 1:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index in samples_start:
sample_idx = samples_start.index(index)
sample_end = samples_end[sample_idx]
len_tokens = sum([
len(list_of_list_token_idx[i])
for i in range(index, sample_end)
])
pos_for_mask.append([len(_input), len(_input) + len_tokens])
if random.random() < keep_origin_rate:
_input += reduce(lambda a, b: a + b,
list_of_list_token_idx[index:sample_end])
else:
_input += [mask_idx] * len_tokens
_lan_input += [src_lan_idx] * len_tokens
index = sample_end
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# get token idxs for output
_output = [[
list_of_list_token_idx[i] for i in range(_sample[0], _sample[1])
] for _sample in samples]
_output = reduce(lambda a, b: a + b, _output)
_output = reduce(lambda a, b: a + b, _output)
# get language index for output
_lan_output = [src_lan_idx] * len(_output)
# get soft position for output
_soft_pos_output = [
list(range(_pos[0], _pos[1])) for _pos in pos_for_mask
]
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
start = _tokenizer.vocab_size + Ids.start_mlm
end = _tokenizer.vocab_size + Ids.end_mlm
# replace the masked word with its synonym, and let the ground truth be its original word
elif mode == 2:
index = 0
len_words = len(list_of_list_token_idx)
pos_for_mask = []
while index < len_words:
if index in samples_start:
sample_idx = samples_start.index(index)
sample_end = samples_end[sample_idx]
_pos = [len(_input)]
tmp_input = random.sample(synonyms_ids_list[sample_idx], 1)[0]
_input += tmp_input
_pos.append(len(_input))
pos_for_mask.append(_pos)
_lan_input += [lan_idx] * len(tmp_input)
index = sample_end
continue
_input += list_of_list_token_idx[index]
_lan_input += [src_lan_idx] * len(list_of_list_token_idx[index])
index += 1
# get token idxs for output
_output = [[
list_of_list_token_idx[i] for i in range(_sample[0], _sample[1])
] for _sample in samples]
_soft_pos_output = [
list(
map(
lambda a: int(round(a)),
np.linspace(_pos[0], _pos[1],
len(reduce(lambda a, b: a + b, _output[i])))))
for i, _pos in enumerate(pos_for_mask)
]
_soft_pos_output = reduce(lambda a, b: a + b, _soft_pos_output)
# _soft_pos_output = list(map(lambda a: int(round(a)), _soft_pos_output))
_output = reduce(lambda a, b: a + b, _output)
_output = reduce(lambda a, b: a + b, _output)
# get language index for output
_lan_output = [src_lan_idx] * len(_output)
# get soft position for output
# _soft_pos_output =
# _soft_pos_output = list(
# map(lambda a: int(round(a)), np.linspace(pos_for_mask[0], pos_for_mask[1], len(_output))))
# _soft_pos_output = [pos_for_mask[0]] * int(len(_output))
start = _tokenizer.vocab_size + Ids.start_cdlm_synonym_2
end = _tokenizer.vocab_size + Ids.end_cdlm_synonym_2
# replace the masked word with its synonym, let the ground truth be the tag of the source sequence;
# the tag value is 0, 1; 0 indicates it is not replaced word, 1 indicates it is a replaced word
# elif mode == 3:
# pass
# add <start> <end> token
_input = [start] + _input + [end]
_output = [start] + _output + [end]
_lan_input = _lan_input[:1] + _lan_input + _lan_input[-1:]
_lan_output = _lan_output[:1] + _lan_output + _lan_output[-1:]
_soft_pos_output = _soft_pos_output[:
1] + _soft_pos_output + _soft_pos_output[
-1:]
return _input, _output, _lan_input, _lan_output, _soft_pos_output