Handle deprecation of FakeBackendV2 in Qiskit 1.0

qiskit_experiments/framework/backend_data.py

@@ -17,7 +17,36 @@ class unifies data access for various data fields.
 """
 from qiskit.providers.models import PulseBackendConfiguration
 from qiskit.providers import BackendV1, BackendV2
-from qiskit.providers.fake_provider import fake_backend, FakeBackendV2, FakeBackend
+from qiskit.providers.fake_provider import FakeBackendV2, FakeBackend
+
+# One of the FakeBackendV2's was moved from qiskit to qiskit-ibm-runtime. Check
+# both packages until dropping support for qiskit<1
+try:
+    from qiskit.providers.fake_provider.fake_backend import FakeBackendV2 as QiskitFakeBackendV2
+except ImportError:
+
+    class QiskitFakeBackendV2:
+        """Dummy class for when FakeBackendV2 import fails
+
+        This class is only used in isinstance checks. If the import fails, then
+        there won't be an instance of the class either so any dummy class is
+        fine.
+        """
+        pass
+
+
+try:
+    from qiskit_ibm_runtime.fake_provider.fake_backend import FakeBackendV2 as RuntimeFakeBackendV2
+except ImportError:
+
+    class RuntimeFakeBackendV2:
+        """Dummy class for when FakeBackendV2 import fails
+
+        This class is only used in isinstance checks. If the import fails, then
+        there won't be an instance of the class either so any dummy class is
+        fine.
+        """
+        pass
 
 
 class BackendData:
@@ -255,7 +284,9 @@ def is_simulator(self):
             if self._backend.configuration().simulator or isinstance(self._backend, FakeBackend):
                 return True
         if self._v2:
-            if isinstance(self._backend, (FakeBackendV2, fake_backend.FakeBackendV2)):
+            if isinstance(
+                self._backend, (FakeBackendV2, QiskitFakeBackendV2, RuntimeFakeBackendV2)
+            ):
                 return True
 
         return False