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add multiple processing

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This commit is contained in:
erenup
2019-12-14 08:43:58 +08:00
parent 9b312f9d41
commit 8e9526b4b5
2 changed files with 187 additions and 160 deletions
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5
examples/run_squad.py
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@@ -360,7 +360,8 @@ def load_and_cache_examples(args, tokenizer, evaluate=False, output_examples=Fal
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=not evaluate,
return_dataset='pt'
return_dataset='pt',
threads=args.threads,
)
if args.local_rank in [-1, 0]:
@@ -478,6 +479,8 @@ def main():
"See details at https://nvidia.github.io/apex/amp.html")
parser.add_argument('--server_ip', type=str, default='', help="Can be used for distant debugging.")
parser.add_argument('--server_port', type=str, default='', help="Can be used for distant debugging.")
parser.add_argument('--threads', type=int, default=1, help='multiple threads for converting example to features')
args = parser.parse_args()
if os.path.exists(args.output_dir) and os.listdir(args.output_dir) and args.do_train and not args.overwrite_output_dir:

126
transformers/data/processors/squad.py
View File

@@ -4,6 +4,9 @@ import logging
import os
import json
import numpy as np
from multiprocessing import Pool
from multiprocessing import cpu_count
from functools import partial
from ...tokenization_bert import BasicTokenizer, whitespace_tokenize
from .utils import DataProcessor, InputExample, InputFeatures
@@ -76,47 +79,9 @@ def _is_whitespace(c):
return True
return False
def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
doc_stride, max_query_length, is_training,
return_dataset=False):
"""
Converts a list of examples into a list of features that can be directly given as input to a model.
It is model-dependant and takes advantage of many of the tokenizer's features to create the model's inputs.
Args:
examples: list of :class:`~transformers.data.processors.squad.SquadExample`
tokenizer: an instance of a child of :class:`~transformers.PreTrainedTokenizer`
max_seq_length: The maximum sequence length of the inputs.
doc_stride: The stride used when the context is too large and is split across several features.
max_query_length: The maximum length of the query.
is_training: whether to create features for model evaluation or model training.
return_dataset: Default False. Either 'pt' or 'tf'.
if 'pt': returns a torch.data.TensorDataset,
if 'tf': returns a tf.data.Dataset
Returns:
list of :class:`~transformers.data.processors.squad.SquadFeatures`
Example::
processor = SquadV2Processor()
examples = processor.get_dev_examples(data_dir)
features = squad_convert_examples_to_features(
examples=examples,
tokenizer=tokenizer,
max_seq_length=args.max_seq_length,
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=not evaluate,
)
"""
# Defining helper methods
unique_id = 1000000000
def squad_convert_example_to_features(example, max_seq_length,
doc_stride, max_query_length, is_training):
features = []
for (example_index, example) in enumerate(tqdm(examples)):
if is_training and not example.is_impossible:
# Get start and end position
start_position = example.start_position
@@ -127,8 +92,7 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
cleaned_answer_text = " ".join(whitespace_tokenize(example.answer_text))
if actual_text.find(cleaned_answer_text) == -1:
logger.warning("Could not find answer: '%s' vs. '%s'", actual_text, cleaned_answer_text)
continue
return []
tok_to_orig_index = []
orig_to_tok_index = []
@@ -171,7 +135,8 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
truncation_strategy='only_second' if tokenizer.padding_side == "right" else 'only_first'
)
paragraph_len = min(len(all_doc_tokens) - len(spans) * doc_stride, max_seq_length - len(truncated_query) - sequence_pair_added_tokens)
paragraph_len = min(len(all_doc_tokens) - len(spans) * doc_stride,
max_seq_length - len(truncated_query) - sequence_pair_added_tokens)
if tokenizer.pad_token_id in encoded_dict['input_ids']:
non_padded_ids = encoded_dict['input_ids'][:encoded_dict['input_ids'].index(tokenizer.pad_token_id)]
@@ -202,7 +167,8 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
for doc_span_index in range(len(spans)):
for j in range(spans[doc_span_index]["paragraph_len"]):
is_max_context = _new_check_is_max_context(spans, doc_span_index, doc_span_index * doc_stride + j)
index = j if tokenizer.padding_side == "left" else spans[doc_span_index]["truncated_query_with_special_tokens_length"] + j
index = j if tokenizer.padding_side == "left" else spans[doc_span_index][
"truncated_query_with_special_tokens_length"] + j
spans[doc_span_index]["token_is_max_context"][index] = is_max_context
for span in spans:
@@ -224,7 +190,6 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
# Set the CLS index to '0'
p_mask[cls_index] = 0
span_is_impossible = example.is_impossible
start_position = 0
end_position = 0
@@ -251,16 +216,14 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
start_position = tok_start_position - doc_start + doc_offset
end_position = tok_end_position - doc_start + doc_offset
features.append(SquadFeatures(
span['input_ids'],
span['attention_mask'],
span['token_type_ids'],
cls_index,
p_mask.tolist(),
example_index=example_index,
unique_id=unique_id,
example_index=0,
unique_id=0,
paragraph_len=span['paragraph_len'],
token_is_max_context=span["token_is_max_context"],
tokens=span["tokens"],
@@ -269,9 +232,71 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
start_position=start_position,
end_position=end_position
))
return features
def squad_convert_example_to_features_init(tokenizer_for_convert):
global tokenizer
tokenizer = tokenizer_for_convert
def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
doc_stride, max_query_length, is_training,
return_dataset=False, threads=1):
"""
Converts a list of examples into a list of features that can be directly given as input to a model.
It is model-dependant and takes advantage of many of the tokenizer's features to create the model's inputs.
Args:
examples: list of :class:`~transformers.data.processors.squad.SquadExample`
tokenizer: an instance of a child of :class:`~transformers.PreTrainedTokenizer`
max_seq_length: The maximum sequence length of the inputs.
doc_stride: The stride used when the context is too large and is split across several features.
max_query_length: The maximum length of the query.
is_training: whether to create features for model evaluation or model training.
return_dataset: Default False. Either 'pt' or 'tf'.
if 'pt': returns a torch.data.TensorDataset,
if 'tf': returns a tf.data.Dataset
threads: multiple processing threadsa-smi
Returns:
list of :class:`~transformers.data.processors.squad.SquadFeatures`
Example::
processor = SquadV2Processor()
examples = processor.get_dev_examples(data_dir)
features = squad_convert_examples_to_features(
examples=examples,
tokenizer=tokenizer,
max_seq_length=args.max_seq_length,
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=not evaluate,
)
"""
# Defining helper methods
features = []
threads = min(threads, cpu_count())
with Pool(threads, initializer=squad_convert_example_to_features_init, initargs=(tokenizer,)) as p:
annotate_ = partial(squad_convert_example_to_features, max_seq_length=max_seq_length,
doc_stride=doc_stride, max_query_length=max_query_length, is_training=is_training)
features = list(tqdm(p.imap(annotate_, examples, chunksize=32), total=len(examples), desc='convert squad examples to features'))
new_features = []
unique_id = 1000000000
example_index = 0
for example_features in tqdm(features, total=len(features), desc='add example index and unique id'):
if not example_features:
continue
for example_feature in example_features:
example_feature.example_index = example_index
example_feature.unique_id = unique_id
new_features.append(example_feature)
unique_id += 1
example_index += 1
features = new_features
del new_features
if return_dataset == 'pt':
if not is_torch_available():
raise ImportError("Pytorch must be installed to return a pytorch dataset.")
@@ -296,7 +321,6 @@ def squad_convert_examples_to_features(examples, tokenizer, max_seq_length,
return features, dataset
return features