def next_for_guessed_voc_token(self, prev_tags_set: set, lword: str,
anals: list or set,
guesser: HashSuffixGuesser) -> dict:
rrr = dict()
tag_probs = dict()
possible_tags = anals
for tag in possible_tags:
new_tag = guesser.mapper.map(tag)
if new_tag > self.model.data.tag_vocabulary.max_index():
emission_prob = UNKNOWN_TAG_WEIGHT
transition_prob = UNKOWN_TAG_TRANSITION
tag_probs[tag] = (transition_prob, emission_prob)
for prev_tags in prev_tags_set:
rrr[prev_tags] = tag_probs
else:
apriori_prob = self.model.compiled_data.apriori_tag_probs[
new_tag]
log_apriori_prob = math.log(apriori_prob)
tag_log_prob = guesser.tag_log_probability(lword, tag)
if tag_log_prob == UNKNOWN_VALUE:
emission_prob = UNKNOWN_TAG_WEIGHT
else:
emission_prob = tag_log_prob - log_apriori_prob
for prev_tags in prev_tags_set:
transition_prob = self.model.compiled_data.tag_transition_model.log_prob(
prev_tags.token_list, tag)
tag_probs[tag] = (transition_prob, emission_prob)
rrr[prev_tags] = tag_probs
return rrr
def next_for_guessed_voc_token(self, prev_tags_set: set,
lword: str,
anals: list or set,
guesser: HashSuffixGuesser) -> dict:
rrr = dict()
tag_probs = dict()
possible_tags = anals
for tag in possible_tags:
new_tag = guesser.mapper.map(tag)
if new_tag > self.model.data.tag_vocabulary.max_index():
emission_prob = UNKNOWN_TAG_WEIGHT
transition_prob = UNKOWN_TAG_TRANSITION
tag_probs[tag] = (transition_prob, emission_prob)
for prev_tags in prev_tags_set:
rrr[prev_tags] = tag_probs
else:
apriori_prob = self.model.compiled_data.apriori_tag_probs[new_tag]
log_apriori_prob = math.log(apriori_prob)
tag_log_prob = guesser.tag_log_probability(lword, tag)
if tag_log_prob == UNKNOWN_VALUE:
emission_prob = UNKNOWN_TAG_WEIGHT
else:
emission_prob = tag_log_prob - log_apriori_prob
for prev_tags in prev_tags_set:
transition_prob = self.model.compiled_data.tag_transition_model.log_prob(
prev_tags.token_list, tag)
tag_probs[tag] = (transition_prob, emission_prob)
rrr[prev_tags] = tag_probs
return rrr
def next_for_guessed_oov_token(self, prev_tags_set: set, lword: str,
guesser: HashSuffixGuesser):
rrr = dict()
tag_probs = dict()
guessed_tags = guesser.tag_log_probabilities(lword)
pruned_guessed_tags = self.prune_guessed_tags(guessed_tags)
for prev_tags in prev_tags_set:
for guess in pruned_guessed_tags:
emission_prob = guess[1]
tag = guess[0]
tag_trans_prob = self.model.compiled_data.tag_transition_model.log_prob(
prev_tags.token_list, tag)
apriori_prob = math.log(
self.model.compiled_data.apriori_tag_probs[tag])
tag_probs[tag] = (tag_trans_prob, emission_prob - apriori_prob)
rrr[prev_tags] = tag_probs
return rrr
def next_for_guessed_oov_token(self, prev_tags_set: set,
lword: str,
guesser: HashSuffixGuesser):
rrr = dict()
tag_probs = dict()
guessed_tags = guesser.tag_log_probabilities(lword)
pruned_guessed_tags = self.prune_guessed_tags(guessed_tags)
for prev_tags in prev_tags_set:
for guess in pruned_guessed_tags:
emission_prob = guess[1]
tag = guess[0]
tag_trans_prob = self.model.compiled_data.tag_transition_model.log_prob(
prev_tags.token_list, tag)
apriori_prob = math.log(self.model.compiled_data.apriori_tag_probs[tag])
tag_probs[tag] = (tag_trans_prob, emission_prob - apriori_prob)
rrr[prev_tags] = tag_probs
return rrr
def prune_guessed_tags(self, guessed_tags: dict) -> set: # set of pairs
# A legnagyobb valószínűségű tag-eket kiszedi, hogy az ismeretlen szavak taggelésénél ne
# vezessenek félre. // „TnT – A Statistical Part-of-Speech Tagger” Brants, Thorsen 2000
# 2.3, 4)
s = set()
max_tag = HashSuffixGuesser.max_probability_tag(guessed_tags)
max_val = guessed_tags[max_tag]
min_val = max_val - self.suf_theta
for k, v in guessed_tags.items():
if v > min_val:
s.add((k, v))
if len(s) > self.max_guessed_tags:
l = list(s)
l.sort(key=lambda ent: ent[1], reverse=True)
for e in l:
if len(s) <= self.max_guessed_tags:
break
s.remove(e)
return s
def prune_guessed_tags(self, guessed_tags: dict) -> set: # set of pairs
# A legnagyobb valószínűségű tag-eket kiszedi, hogy az ismeretlen szavak taggelésénél ne
# vezessenek félre. // „TnT – A Statistical Part-of-Speech Tagger” Brants, Thorsen 2000
# 2.3, 4)
s = set()
max_tag = HashSuffixGuesser.max_probability_tag(guessed_tags)
max_val = guessed_tags[max_tag]
min_val = max_val - self.suf_theta
for k, v in guessed_tags.items():
if v > min_val:
s.add((k, v))
if len(s) > self.max_guessed_tags:
l = list(s)
l.sort(key=lambda ent: ent[1], reverse=True)
for e in l:
if len(s) <= self.max_guessed_tags:
break
s.remove(e)
return s
def create_guesser(self, theta: float) -> HashSuffixGuesser:
return HashSuffixGuesser(self.representation, theta)
