57 lines
2.1 KiB
Python
Executable File
57 lines
2.1 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright 2020 The HuggingFace Team. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import fire
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from torch.utils.data import DataLoader
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from tqdm import tqdm
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from transformers import AutoTokenizer
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from utils import Seq2SeqDataset, pickle_save
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def save_len_file(
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tokenizer_name, data_dir, max_source_length=1024, max_target_length=1024, consider_target=False, **kwargs
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):
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"""Save max(src_len, tgt_len) for each example to allow dynamic batching."""
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tok = AutoTokenizer.from_pretrained(tokenizer_name)
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train_ds = Seq2SeqDataset(tok, data_dir, max_source_length, max_target_length, type_path="train", **kwargs)
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pad = tok.pad_token_id
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def get_lens(ds):
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dl = tqdm(
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DataLoader(ds, batch_size=512, num_workers=8, shuffle=False, collate_fn=ds.collate_fn),
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desc=str(ds.len_file),
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)
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max_lens = []
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for batch in dl:
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src_lens = batch["input_ids"].ne(pad).sum(1).tolist()
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tgt_lens = batch["labels"].ne(pad).sum(1).tolist()
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if consider_target:
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for src, tgt in zip(src_lens, tgt_lens):
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max_lens.append(max(src, tgt))
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else:
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max_lens.extend(src_lens)
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return max_lens
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train_lens = get_lens(train_ds)
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val_ds = Seq2SeqDataset(tok, data_dir, max_source_length, max_target_length, type_path="val", **kwargs)
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val_lens = get_lens(val_ds)
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pickle_save(train_lens, train_ds.len_file)
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pickle_save(val_lens, val_ds.len_file)
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if __name__ == "__main__":
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fire.Fire(save_len_file)
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