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743c8c5 | 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 | #!/usr/bin/env python3
# /// script
# requires-python = ">=3.11"
# dependencies = ["duckdb>=1.0"]
# ///
"""Convert a digests.parquet (base32 sha1, Common Crawl convention) to
uppercase-hex lines on stdout, ready for `hdx filters build cc sha1`.
uv run tools/cc_digests_to_hex.py cc-out/CC-MAIN-2026-30/digests.parquet \
> ~/.cache/hashdex/extracts/cc.sha1.hex
"""
import base64
import sys
import duckdb
def main():
if len(sys.argv) != 2:
sys.exit(__doc__)
con = duckdb.connect()
cur = con.execute(
"SELECT digest_b32 FROM read_parquet(?)", [sys.argv[1]]
)
out = sys.stdout
bad = 0
while batch := cur.fetchmany(100_000):
lines = []
for (b32,) in batch:
try:
raw = base64.b32decode(b32)
except Exception:
bad += 1
continue
if len(raw) != 20:
bad += 1
continue
lines.append(raw.hex().upper())
out.write("\n".join(lines) + "\n")
if bad:
print(f"skipped {bad} undecodable digests", file=sys.stderr)
if __name__ == "__main__":
main()
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