Fixing Deprecation Warning

setup.py

@@ -18,6 +18,7 @@
     "matplotlib>=3.4.3",
     "scipy>=1.8",
     "qiskit>=0.36.1",
+    "qiskit-ibm-provider",
     "pyquil>=3.1.0",
     "docplex>=2.23.1",
     "autograd>=1.4",

src/openqaoa-qiskit/backends/devices.py

@@ -1,4 +1,4 @@
-from qiskit import IBMQ
+from qiskit_ibm_provider import IBMProvider
 from qiskit_aer import AerSimulator
 from typing import List
 from openqaoa.backends.devices_core import DeviceBase
@@ -81,7 +81,7 @@ def check_connection(self) -> bool:
         if self.provider_connected == False:
             return self.provider_connected
 
-        self.available_qpus = [backend.name() for backend in self.provider.backends()]
+        self.available_qpus = [backend.name for backend in self.provider.backends()]
 
         if self.device_name == "":
             return self.provider_connected
@@ -112,18 +112,26 @@ def _check_provider_connection(self) -> bool:
         """
 
         try:
-            self.provider = IBMQ.load_account()
-            if any([self.hub, self.group, self.project]):
-                self.provider = IBMQ.get_provider(
-                    hub=self.hub, group=self.group, project=self.project
-                )
+            #Use default
+            self.provider = IBMProvider()
+            #Unless exact instance is specified
+            if all([self.hub, self.group, self.project]):
+                instance_name = self.hub + '/' + self.group + '/' + self.project
+                assert instance_name in self.provider.instances()
+                self.provider = IBMProvider(instance=instance_name)
+            elif any([self.hub, self.group, self.project]):
+                #if only partially specified, print warning.
+                raise Exception("You've only partially specified the instance name. Either"
+                                "the hub, group or project is missing. hub: {}, group: {}, project: {}.\n"
+                                "The default instance will be used instead. (This default can "
+                                "be specified when doing `IBMProvider.save_account`)")
             return True
         except Exception as e:
             print(
                 "An Exception has occured when trying to connect with the provider."
                 "Please note that you are required to set up your IBMQ account locally first."
                 "See: https://quantum-computing.ibm.com/lab/docs/iql/manage/account/ibmq"
-                "for how to save your IBMQ account locally: {}".format(e)
+                "for how to save your IBMQ account locally. \n {}".format(e)
             )
             return False
 

src/openqaoa-qiskit/backends/qaoa_qiskit_qpu.py

@@ -4,11 +4,11 @@
 
 # IBM Qiskit imports
 from qiskit import QuantumCircuit, QuantumRegister, ClassicalRegister, transpile
-from qiskit.providers.ibmq.job import (
-    IBMQJobApiError,
-    IBMQJobInvalidStateError,
-    IBMQJobFailureError,
-    IBMQJobTimeoutError,
+from qiskit_ibm_provider.job.exceptions import (
+    IBMJobApiError,
+    IBMJobInvalidStateError,
+    IBMJobFailureError,
+    IBMJobTimeoutError,
 )
 from qiskit.circuit import Parameter
 
@@ -239,12 +239,12 @@ def get_counts(self, params: QAOAVariationalBaseParams, n_shots=None) -> dict:
                     counts = job.result().get_counts()
                     api_contact = True
                     job_state = True
-                except (IBMQJobApiError, IBMQJobTimeoutError):
+                except (IBMJobApiError, IBMJobTimeoutError):
                     print("There was an error when trying to contact the IBMQ API.")
                     job_state = True
                     no_of_api_retries += 1
                     time.sleep(5)
-                except (IBMQJobFailureError, IBMQJobInvalidStateError):
+                except (IBMJobFailureError, IBMJobInvalidStateError):
                     print("There was an error with the state of the Job in IBMQ.")
                     no_of_job_retries += 1
                     break

tests/test_qpu_devices.py

@@ -30,6 +30,7 @@ def setUp(self):
         self.HUB = "ibm-q"
         self.GROUP = "open"
         self.PROJECT = "main"
+        self.INSTANCE = "ibm-q/open/main"
 
     @pytest.mark.api
     def test_changing_provider(self):
@@ -42,21 +43,28 @@ def test_changing_provider(self):
 
         device_obj = DeviceQiskit(device_name="ibmq_manila")
         device_obj.check_connection()
+
+        provider_instances = device_obj.provider.instances()
+
+        if len(provider_instances) >= 2:
+
+            for each_item in provider_instances[:2]:
+
+                [hub, group, project] = each_item.split('/')
+                device_obj2 = DeviceQiskit(device_name="ibmq_manila", hub=hub, group=group, project=project)
+                device_obj2.check_connection()
+
+                self.assertEqual(device_obj2.provider._account.instance, each_item)
 
-        self.assertEqual(device_obj.provider.credentials.hub, self.HUB)
-        self.assertEqual(device_obj.provider.credentials.group, self.GROUP)
-        self.assertEqual(device_obj.provider.credentials.project, self.PROJECT)
-
-        device_obj2 = DeviceQiskit(device_name="ibmq_manila", hub="ibm-q-startup")
-        device_obj2.check_connection()
-        self.assertEqual(device_obj2.provider.credentials.hub, "ibm-q-startup")
 
     @pytest.mark.api
     def test_check_connection_provider_no_backend_wrong_hub_group_project(self):
 
         """
-        If the wrong hub, group or project is specified, check_connection should
+        Hub, group and project must always be specified together.
+        If either the hub, group or project is wrongly specified, check_connection should
         return False.
+        If not all 3 are specified, check_connection should return False.
         The provider_connected attribute should be updated to False.
         Since the API Token is loaded from save_account, the api token will be
         checked by Qiskit.