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6342c6d | 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 | """Emit JSON statistics for the train parquet, for use by the dataset-card skill."""
from __future__ import annotations
import json
import sys
from pathlib import Path
import pyarrow.parquet as pq
REPO = Path(__file__).resolve().parent.parent
PARQUET = REPO / "data" / "train-00000-of-00001.parquet"
def main() -> int:
if not PARQUET.exists():
print(json.dumps({"error": f"missing {PARQUET}"}))
return 1
pf = pq.ParquetFile(PARQUET)
table = pf.read()
num_rows = table.num_rows
num_bytes_disk = PARQUET.stat().st_size
num_bytes_uncompressed = sum(chunk.nbytes for c in table.columns for chunk in c.chunks)
out = {
"num_rows": num_rows,
"num_bytes_disk": num_bytes_disk,
"num_bytes_uncompressed": int(num_bytes_uncompressed),
"schema": [{"name": f.name, "type": str(f.type)} for f in table.schema],
"parquet_relpath": "data/train-00000-of-00001.parquet",
}
print(json.dumps(out, ensure_ascii=False, indent=2))
return 0
if __name__ == "__main__":
sys.exit(main())
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