[not working] clean up

pytket/extensions/qiskit/backends/ibmq_emulator.py

@@ -89,6 +89,13 @@ def __init__(
         # Get noise model:
         self._noise_model = NoiseModel.from_backend(self._ibmq._backend)
 
+        if self._ibmq._backend._backend_info.n_nodes > 32:
+            raise ValueError("ibmq_qasm_simulator only supports 32 qubits, \
+devices with more than 32 qubtis can't be simulated")
+
+        if OpType.ECR in self._ibmq._backend._primitive_gates:
+            raise ValueError("ibmq_qasm_simulator does not support ECR in gateset")
+
         # cache of results keyed by job id and circuit index
         self._ibm_res_cache: Dict[Tuple[str, int], Counter] = dict()
 

tests/backend_test.py

@@ -470,10 +470,9 @@ def test_nshots_batching(brisbane_backend: IBMQBackend) -> None:
 @pytest.mark.flaky(reruns=3, reruns_delay=10)
 @pytest.mark.skipif(skip_remote_tests, reason=REASON)
 def test_nshots(
-    brisbane_emulator_backend: IBMQEmulatorBackend,
     brisbane_local_emulator_backend: IBMQLocalEmulatorBackend,
 ) -> None:
-    for b in [AerBackend(), brisbane_emulator_backend, brisbane_local_emulator_backend]:
+    for b in [AerBackend(), brisbane_local_emulator_backend]:
         circuit = Circuit(1).X(0)
         circuit.measure_all()
         n_shots = [1, 2, 3]
@@ -835,10 +834,9 @@ def test_operator_expectation_value() -> None:
 @pytest.mark.flaky(reruns=3, reruns_delay=10)
 @pytest.mark.skipif(skip_remote_tests, reason=REASON)
 def test_ibmq_emulator(
-    ibmq_qasm_emulator_backend: IBMQEmulatorBackend,
     brisbane_local_emulator_backend: IBMQLocalEmulatorBackend,
 ) -> None:
-    for b in [ibmq_qasm_emulator_backend, brisbane_local_emulator_backend]:
+    for b in [brisbane_local_emulator_backend]:
         assert b._noise_model is not None  # type: ignore
         b_ibm = b._ibmq  # type: ignore
         b_aer = AerBackend()