transformers/examples/seq2seq/download_wmt.py
2020-08-10 22:49:39 -04:00

49 lines
1.7 KiB
Python

from pathlib import Path
import fire
from tqdm import tqdm
def download_wmt_dataset(src_lang, tgt_lang, dataset="wmt19", save_dir=None) -> None:
"""Download a dataset using the nlp package and save it to the format expected by finetune.py
Format of save_dir: train.source, train.target, val.source, val.target, test.source, test.target.
Args:
src_lang: <str> source language
tgt_lang: <str> target language
dataset: <str> like wmt19 (if you don't know, try wmt19).
save_dir: <str>, where to save the datasets, defaults to f'{dataset}-{src_lang}-{tgt_lang}'
Usage:
>>> download_wmt_dataset('en', 'ru', dataset='wmt19') # saves to wmt19_en_ru
"""
try:
import nlp
except (ModuleNotFoundError, ImportError):
raise ImportError("run pip install nlp")
pair = f"{src_lang}-{tgt_lang}"
ds = nlp.load_dataset(dataset, pair)
if save_dir is None:
save_dir = f"{dataset}-{pair}"
save_dir = Path(save_dir)
save_dir.mkdir(exist_ok=True)
for split in tqdm(ds.keys()):
tr_list = list(ds[split])
data = [x["translation"] for x in tr_list]
src, tgt = [], []
for example in data:
src.append(example[src_lang])
tgt.append(example[tgt_lang])
if split == "validation":
split = "val" # to save to val.source, val.target like summary datasets
src_path = save_dir.joinpath(f"{split}.source")
src_path.open("w+").write("\n".join(src))
tgt_path = save_dir.joinpath(f"{split}.target")
tgt_path.open("w+").write("\n".join(tgt))
print(f"saved dataset to {save_dir}")
if __name__ == "__main__":
fire.Fire(download_wmt_dataset)