Datasets:
File size: 2,085 Bytes
0b53802 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | #!/usr/bin/env python3
"""Restore ICW WebDataset shards to split/identity/image.jpg folders."""
from __future__ import annotations
import argparse
import io
import json
import tarfile
from pathlib import Path
def main() -> None:
parser = argparse.ArgumentParser()
parser.add_argument("release", type=Path)
parser.add_argument("output", type=Path)
args = parser.parse_args()
release = args.release.resolve()
output = args.output.resolve()
output.mkdir(parents=True, exist_ok=True)
manifest = json.loads((release / "manifest.json").read_text(encoding="utf-8"))
restored = 0
for shard in manifest["shards"]:
pending_key: str | None = None
pending_image: bytes | None = None
with tarfile.open(release / shard["path"], "r:") as archive:
for member in archive:
extracted = archive.extractfile(member)
if extracted is None:
raise RuntimeError(f"Cannot read {member.name}")
key = Path(member.name).stem
if member.name.endswith(".jpg"):
pending_key = key
pending_image = extracted.read()
elif member.name.endswith(".json"):
if pending_key != key or pending_image is None:
raise RuntimeError(f"Invalid member order near {member.name}")
metadata = json.load(extracted)
split = str(metadata["split"])
identity = str(metadata["identity_id"])
image_name = str(metadata["image_filename"])
destination = output / split / identity / image_name
destination.parent.mkdir(parents=True, exist_ok=True)
destination.write_bytes(pending_image)
restored += 1
pending_key = None
pending_image = None
print(f"restored {shard['path']}")
print(f"complete: {restored} images restored to {output}")
if __name__ == "__main__":
main()
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