102 lines
3.3 KiB
Python
102 lines
3.3 KiB
Python
from typing import List, Callable
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from datasets import load_dataset
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from tokenizer import BpeTokenizer
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from tqdm import tqdm
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from torch import Tensor
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import pickle as pkl
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import torch
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import json
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import os
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import re
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def fetch_files(directory):
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return [os.path.join(root, f)
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for root, _, files in os.walk(directory) for f in files]
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def comprehensive_normalization(text):
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replacements = {
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'\u2018': "'", '\u2019': "'", '\u0060': "'",
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'\u201C': '"', '\u201D': '"',
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'\u2013': '-', '\u2014': '--', '\u2212': '-',
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'\u00A0': ' ',
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'\u2026': '...'
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}
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pattern = re.compile('|'.join(re.escape(k) for k in replacements))
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return pattern.sub(lambda m: replacements[m.group()], text)
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def dump_pkl_files(
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tokenizer: BpeTokenizer,
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files: List[str],
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base_out_dir: str,
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encoder: Callable[[str], str]=None,
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key: str='text',
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):
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def process_line(line: str) -> Tensor:
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line = json.loads(line)[key]
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processed_line = encoder(line)
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ids = tokenizer.encode(processed_line)
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arrow = torch.tensor(ids, dtype=torch.int32)
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return arrow
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for file_path in files:
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out_file_name = os.path.basename(file_path).replace(".jsonl", ".pkl")
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out_file_path = os.path.join(base_out_dir, out_file_name)
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file_name = os.path.basename(file_path)
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arrows = []
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os.makedirs(os.path.dirname(out_file_path), exist_ok=True)
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with open(file_path, "r") as f:
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lines = f.readlines()
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for line in tqdm(lines, desc=f"Processing {file_name}", leave=False):
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arrow = process_line(line)
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arrows.append(arrow)
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with open(out_file_path, "wb") as f:
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tensor = torch.cat(arrows)
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pkl.dump(tensor, f)
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def process_dataset(
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dataset_name: str,
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output_subdir: str,
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dataset_config: str = None,
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max_chunk_num: int = None,
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split: str = None,
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split_name: str = "train",
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column_name: str = "text",
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chunk_size: int = 1000000,
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normalization_func=comprehensive_normalization
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):
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dataset_dict = load_dataset(
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data_dir=dataset_name,
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data_files=dataset_config,
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split=split
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)
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train_dataset = dataset_dict[split_name]
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total_samples = len(train_dataset)
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num_chunks = (total_samples // chunk_size) + 1
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lim_chunks = min(max_chunk_num, num_chunks) if max_chunk_num else num_chunks
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script_dir = os.path.dirname(os.path.abspath(__file__))
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output_dir = os.path.join(script_dir, "dataset", output_subdir)
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os.makedirs(output_dir, exist_ok=True)
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for i in range(lim_chunks):
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start_idx = i * chunk_size
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end_idx = min((i + 1) * chunk_size, total_samples)
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chunk = train_dataset.select(range(start_idx, end_idx))
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output_path = os.path.join(output_dir, f"{output_subdir}_text_chunk_{i}.jsonl")
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with open(output_path, "w", encoding="utf-8") as f:
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for example in chunk:
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text = example[column_name]
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if normalization_func:
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text = normalization_func(text)
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json_line = {column_name : text}
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f.write(json.dumps(json_line, ensure_ascii=False) + "\n")
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print(f"Saved text chunk {i} to {output_path}")
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