style: format parity harness with black

Made-with: Cursor

tests/parity/signals/run_parity.py

@@ -14,6 +14,7 @@ Usage:
         --rust-binary ../../../crates/target/release/signals_replay \\
         --output-dir out/
 """
+
 from __future__ import annotations
 
 import argparse
@@ -30,7 +31,10 @@ try:
     import pyarrow.parquet as pq
     from huggingface_hub import hf_hub_download, list_repo_files
 except ImportError:
-    print("error: install dependencies first: pip install -r requirements.txt", file=sys.stderr)
+    print(
+        "error: install dependencies first: pip install -r requirements.txt",
+        file=sys.stderr,
+    )
     sys.exit(2)
 
 try:
@@ -46,6 +50,7 @@ except ImportError:
 try:
     from tqdm import tqdm
 except ImportError:
+
     def tqdm(it, **_kwargs):  # type: ignore[no-redef]
         return it
 
@@ -154,7 +159,10 @@ def sample_conversations(
         pf = pq.ParquetFile(str(p))
         shard_row_counts.append(pf.metadata.num_rows)
     total_rows = sum(shard_row_counts)
-    print(f"dataset has {total_rows:,} rows across {len(local_paths)} shards", file=sys.stderr)
+    print(
+        f"dataset has {total_rows:,} rows across {len(local_paths)} shards",
+        file=sys.stderr,
+    )
 
     rng = random.Random(seed)
     global_indices = sorted(rng.sample(range(total_rows), num_samples))
@@ -255,9 +263,13 @@ def stamp_metadata(args: argparse.Namespace, output_dir: Path, n_samples: int) -
     """Write the input metadata so compare.py can include it in the report."""
     binary_sha = hashlib.sha256(args.rust_binary.read_bytes()).hexdigest()
     try:
-        plano_sha = subprocess.check_output(
-            ["git", "rev-parse", "HEAD"], cwd=Path(__file__).parent
-        ).decode().strip()
+        plano_sha = (
+            subprocess.check_output(
+                ["git", "rev-parse", "HEAD"], cwd=Path(__file__).parent
+            )
+            .decode()
+            .strip()
+        )
     except Exception:
         plano_sha = "unknown"
     try:
@@ -265,7 +277,11 @@ def stamp_metadata(args: argparse.Namespace, output_dir: Path, n_samples: int) -
             [sys.executable, "-m", "pip", "show", "signals"]
         ).decode()
         signals_version = next(
-            (l.split(":", 1)[1].strip() for l in signals_version.splitlines() if l.startswith("Version")),
+            (
+                l.split(":", 1)[1].strip()
+                for l in signals_version.splitlines()
+                if l.startswith("Version")
+            ),
             "unknown",
         )
     except Exception: