🚨 fix typing in tests

Signed-off-by: Lukas Burgholzer <lukas.burgholzer@jku.at>

Author: burgholzer

test/python/test_subarchitectures.py

@@ -1,19 +1,28 @@
 """Test subarchitecture generation."""
 
+from __future__ import annotations
+
+import contextlib
 from pathlib import Path
+from typing import TYPE_CHECKING, Optional
 
 import pytest
 import rustworkx as rx
 from qiskit.providers.fake_provider import FakeLondon
 
 from mqt.qmap import Architecture
 from mqt.qmap.subarchitectures import (
-    Graph,
     SubarchitectureOrder,
     ibm_guadalupe_subarchitectures,
     rigetti_16_subarchitectures,
 )
 
+if TYPE_CHECKING:
+    from typing_extensions import TypeAlias
+
+with contextlib.suppress(TypeError):
+    Graph: TypeAlias = rx.PyGraph[int, Optional[int]]
+
 
 @pytest.fixture()
 def ibm_guadalupe() -> SubarchitectureOrder: