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author | Gustaf Rydholm <gustaf.rydholm@gmail.com> | 2021-03-20 18:09:06 +0100 |
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committer | Gustaf Rydholm <gustaf.rydholm@gmail.com> | 2021-03-20 18:09:06 +0100 |
commit | 7e8e54e84c63171e748bbf09516fd517e6821ace (patch) | |
tree | 996093f75a5d488dddf7ea1f159ed343a561ef89 /src/tasks/make_wordpieces.py | |
parent | b0719d84138b6bbe5f04a4982dfca673aea1a368 (diff) |
Inital commit for refactoring to lightning
Diffstat (limited to 'src/tasks/make_wordpieces.py')
-rw-r--r-- | src/tasks/make_wordpieces.py | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/src/tasks/make_wordpieces.py b/src/tasks/make_wordpieces.py deleted file mode 100644 index 2ac0e2c..0000000 --- a/src/tasks/make_wordpieces.py +++ /dev/null @@ -1,114 +0,0 @@ -"""Creates word pieces from a text file. - -Most code stolen from: - - https://github.com/facebookresearch/gtn_applications/blob/master/scripts/make_wordpieces.py - -""" -import io -from pathlib import Path -from typing import List, Optional, Union - -import click -from loguru import logger -import sentencepiece as spm - -from text_recognizer.datasets.iam_preprocessor import load_metadata - - -def iamdb_pieces( - data_dir: Path, text_file: str, num_pieces: int, output_prefix: str -) -> None: - """Creates word pieces from the iamdb train text.""" - # Load training text. - with open(data_dir / text_file, "r") as f: - text = [line.strip() for line in f] - - sp = train_spm_model( - iter(text), - num_pieces + 1, # To account for <unk> - user_symbols=["/"], # added so token is in the output set - ) - - vocab = sorted(set(w for t in text for w in t.split("▁") if w)) - if "move" not in vocab: - raise RuntimeError("`MOVE` not in vocab") - - save_pieces(sp, num_pieces, data_dir, output_prefix, vocab) - - -def train_spm_model( - sentences: iter, vocab_size: int, user_symbols: Union[str, List[str]] = "" -) -> spm.SentencePieceProcessor: - """Trains the sentence piece model.""" - model = io.BytesIO() - spm.SentencePieceTrainer.train( - sentence_iterator=sentences, - model_writer=model, - vocab_size=vocab_size, - bos_id=-1, - eos_id=-1, - character_coverage=1.0, - user_defined_symbols=user_symbols, - ) - sp = spm.SentencePieceProcessor(model_proto=model.getvalue()) - return sp - - -def save_pieces( - sp: spm.SentencePieceProcessor, - num_pieces: int, - data_dir: Path, - output_prefix: str, - vocab: set, -) -> None: - """Saves word pieces to disk.""" - logger.info(f"Generating word piece list of size {num_pieces}.") - pieces = [sp.id_to_piece(i) for i in range(1, num_pieces + 1)] - logger.info(f"Encoding vocabulary of size {len(vocab)}.") - encoded_vocab = [sp.encode_as_pieces(v) for v in vocab] - - # Save pieces to file. - with open(data_dir / f"{output_prefix}_tokens_{num_pieces}.txt", "w") as f: - f.write("\n".join(pieces)) - - # Save lexicon to a file. - with open(data_dir / f"{output_prefix}_lex_{num_pieces}.txt", "w") as f: - for v, p in zip(vocab, encoded_vocab): - f.write(f"{v} {' '.join(p)}\n") - - -@click.command() -@click.option("--data_dir", type=str, default=None, help="Path to processed iam dir.") -@click.option( - "--text_file", type=str, default=None, help="Name of sentence piece training text." -) -@click.option( - "--output_prefix", - type=str, - default="word_pieces", - help="Prefix name to store tokens and lexicon.", -) -@click.option("--num_pieces", type=int, default=1000, help="Number of word pieces.") -def cli( - data_dir: Optional[str], - text_file: Optional[str], - output_prefix: Optional[str], - num_pieces: Optional[int], -) -> None: - """CLI for training the sentence piece model.""" - if data_dir is None: - data_dir = ( - Path(__file__).resolve().parents[2] / "data" / "processed" / "iam_lines" - ) - logger.debug(f"Using data dir: {data_dir}") - if not data_dir.exists(): - raise RuntimeError(f"Could not locate iamdb directory at {data_dir}") - else: - data_dir = Path(data_dir) - - iamdb_pieces(data_dir, text_file, num_pieces, output_prefix) - - -if __name__ == "__main__": - cli() |