Add deprecation warning

qiskit/providers/ibmq/__init__.py

@@ -80,6 +80,7 @@
 """
 
 import logging
+import warnings
 from typing import List, Optional, Union
 from datetime import datetime, timedelta
 
@@ -97,6 +98,17 @@
 from .runner_result import RunnerResult
 from .version import __version__
 
+warnings.warn(
+    f"The package {__name__} is being deprecated. "
+    "Please see "
+    "https://ibm.biz/provider_migration_guide"
+    " to get instructions on how to migrate to "
+    "qiskit-ibm-provider (https://github.com/Qiskit/qiskit-ibm-provider) and "
+    "qiskit-ibm-runtime (https://github.com/Qiskit/qiskit-ibm-runtime).",
+    DeprecationWarning,
+    stacklevel=3
+)
+
 # Setup the logger for the IBM Quantum Provider package.
 logger = logging.getLogger(__name__)
 setup_logger(logger)

test/ibmq/runtime/test_runtime.py

@@ -287,7 +287,7 @@ def test_encoder_callable(self):
             encoded = json.dumps({"fidelity": lambda x: x}, cls=RuntimeEncoder)
             decoded = json.loads(encoded, cls=RuntimeDecoder)
             self.assertIsNone(decoded["fidelity"])
-            self.assertEqual(len(warn_cm), 1)
+            self.assertEqual(len(warn_cm), 2)
 
     def test_decoder_import(self):
         """Test runtime decoder importing modules."""