def _key_with_random_key(
example,
seed,
num_random_table_bins,
num_corpus_bins,
):
"""Computes a new random key (train/test split aware) for random pairing."""
key, _ = example
seed = seed + tf_example_utils.fingerprint(key)
rng = random.Random(seed)
# Add train/test information so that random buckets don't cross over.
partition = pretrain_utils.partition_fn(example, 2, num_corpus_bins)
return f'{partition}_{rng.randint(0, num_random_table_bins)}', example
def process(self, element):
beam.metrics.Metrics.counter(_NS, "Interactions").inc()
key, (interaction, random_table) = element
seed = tf_example_utils.fingerprint(
"%s_%d_%d" %
(key, self._config.random_seed, self._config.max_seq_length))
rng = random.Random(seed)
example = self._converter.convert(rng, interaction, random_table)
if example:
beam.metrics.Metrics.counter(_NS, "Examples").inc()
yield prepand_fingerprint(key), example
def fingerprint(key):
return "%08X" % abs(tf_example_utils.fingerprint(key))
def to_numpy_seed(obj):
return tf_example_utils.fingerprint(repr(obj)) % _MAX_INT
def convert(
self,
interaction,
index,
negative_example,
):
"""Converts question at 'index' to example."""
table = interaction.table
num_rows = len(table.rows)
if num_rows >= self._max_row_id:
num_rows = self._max_row_id - 1
num_columns = len(table.columns)
if num_columns >= self._max_column_id:
num_columns = self._max_column_id - 1
title = table.document_title
if not self._use_document_title:
title = ''
title_tokens = self._tokenizer.tokenize(title)
tokenized_table = self._tokenize_table(table)
while True:
try:
_, features = self._to_trimmed_features(
question=None,
table=table,
question_tokens=title_tokens,
tokenized_table=tokenized_table,
num_columns=num_columns,
num_rows=num_rows)
break
except ValueError:
pass
# Since this is retrieval we might get away with removing some cells of
# the table.
# TODO(thomasmueller) Consider taking the token length into account.
if num_columns >= num_rows:
num_columns -= 1
else:
num_rows -= 1
if num_columns == 0 or num_rows == 0:
raise ValueError('Cannot fit table into sequence.')
question = interaction.questions[index]
features['question_id'] = base.create_string_feature(
[question.id.encode('utf8')])
features['question_id_ints'] = base.create_int_feature(
text_utils.str_to_ints(question.id,
length=text_utils.DEFAULT_INTS_LENGTH))
q_tokens = self._tokenizer.tokenize(question.text)
q_tokens = self._serialize_text(q_tokens)[0]
q_tokens.append(base.Token(_SEP, _SEP))
q_input_ids = self._to_token_ids(q_tokens)
self._pad_to_seq_length(q_input_ids)
q_input_mask = [1] * len(q_tokens)
self._pad_to_seq_length(q_input_mask)
features['question_input_ids'] = base.create_int_feature(q_input_ids)
features['question_input_mask'] = base.create_int_feature(q_input_mask)
if question:
features['question_hash'] = base.create_int_feature(
[base.fingerprint(question.text) % _MAX_INT])
if negative_example is not None:
n_table = negative_example.table
n_title_tokens = self._tokenizer.tokenize(n_table.document_title)
n_tokenized_table = self._tokenize_table(n_table)
n_num_rows = self._get_num_rows(n_table, drop_rows_to_fit=True)
n_num_columns = self._get_num_columns(n_table)
_, n_example_features = self._to_trimmed_features(
question=None,
table=n_table,
question_tokens=n_title_tokens,
tokenized_table=n_tokenized_table,
num_columns=n_num_columns,
num_rows=n_num_rows,
drop_rows_to_fit=True)
_join_features(features, n_example_features)
return tf.train.Example(features=tf.train.Features(feature=features))
