| |
| """Extract the training frames and prepare local SFT/GRPO input paths.""" |
| from pathlib import Path |
| import argparse,json,tarfile |
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| def read(path): |
| return [json.loads(line) for line in path.read_text().splitlines() if line.strip()] |
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| def main(): |
| parser=argparse.ArgumentParser(description=__doc__) |
| parser.add_argument('--root',type=Path,default=Path(__file__).resolve().parents[1]) |
| parser.add_argument('--output',type=Path,default=None) |
| args=parser.parse_args();root=args.root.resolve();out=(args.output or root/'prepared').resolve() |
| sft=read(root/'sft/train.jsonl');grpo=read(root/'grpo/train.jsonl') |
| if len(sft)!=3657 or len(grpo)!=2842:raise ValueError('Unexpected training population') |
| sids={r['id'] for r in sft};gids={r['id'] for r in grpo} |
| if len(sids)!=len(sft) or len(gids)!=len(grpo) or not gids<=sids:raise ValueError('Question ID mismatch') |
| frames={p for row in sft for p in row['images']} |
| if len(frames)!=61152 or any(len(r['images'])!=32 for r in sft+grpo):raise ValueError('Unexpected frame population') |
| out.mkdir(parents=True,exist_ok=True) |
| with tarfile.open(root/'media/frames.tar','r:') as archive: |
| members=archive.getmembers();files=[m for m in members if m.isfile()] |
| if len(files)!=len(frames) or {m.name for m in files}!=frames:raise ValueError('Frame archive population mismatch') |
| if any(not m.isfile() or not m.name.startswith('media/frames/') or not (out/m.name).resolve().is_relative_to(out) for m in members):raise ValueError('Unexpected frame archive member') |
| missing=[m for m in files if not (out/m.name).is_file() or (out/m.name).stat().st_size!=m.size] |
| if missing: |
| archive.extractall(out,members=missing,filter='data') |
| for name,rows in [('sft',sft),('grpo',grpo)]: |
| output=[] |
| for row in rows: |
| new=dict(row);new['images']=[str((out/p).resolve()) for p in row['images']] |
| if any(not Path(p).is_file() for p in new['images']):raise FileNotFoundError(row['id']) |
| if 'path' in row:new['path']=str((root/row['path']).resolve()) |
| output.append(new) |
| target=out/(name+'.jsonl');temporary=target.with_suffix('.jsonl.tmp') |
| temporary.write_text(''.join(json.dumps(r,ensure_ascii=False)+'\n' for r in output));temporary.replace(target) |
| print(json.dumps({'sft':len(sft),'grpo_candidates':len(grpo),'frames':len(frames),'output':str(out)},indent=2)) |
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| if __name__=='__main__':main() |
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