fix precommit

Author: ryankert01

qdp/qdp-python/qumat_qdp/api.py

@@ -124,9 +124,7 @@ def warmup(self, n: int) -> QdpBenchmark:
     def backend(self, name: str) -> QdpBenchmark:
         """Set benchmark backend: ``'rust'`` or ``'pytorch'``."""
         if name not in ("rust", "pytorch"):
-            raise ValueError(
-                f"backend must be 'rust' or 'pytorch', got {name!r}"
-            )
+            raise ValueError(f"backend must be 'rust' or 'pytorch', got {name!r}")
         self._backend_name = name
         return self
 

testing/qdp_python/test_quantum_data_loader.py

@@ -28,7 +28,7 @@
 try:
     from qumat_qdp.loader import QuantumDataLoader
 except ImportError:
-    QuantumDataLoader = None
+    QuantumDataLoader: type[QuantumDataLoaderType] | None = None
 
 
 def _loader_available():

testing/qdp_python/test_torch_ref.py

@@ -370,7 +370,7 @@ def test_encoding_matches_rust(self, encoding):
         import _qdp
         import numpy as np
 
-        engine = _qdp.QdpEngine(0)
+        engine = _qdp.QdpEngine(0)  # type: ignore[unresolved-attribute]
         num_qubits = 3
         state_dim = 1 << num_qubits