Deprecate PrimitivesV1 reference implementations and their utils

qiskit/primitives/base/base_primitive.py

@@ -23,7 +23,7 @@
 class BasePrimitive(ABC):
     """Primitive abstract base class."""
 
-    @deprecate_func(since="1.2", additional_msg="Use BasePrimitiveV2 instead.")
+    @deprecate_func(since="1.2", additional_msg="Use BaseSamplerV2 or BaseEstimatorV2 instead.")
     def __init__(self, options: dict | None = None):
         self._run_options = Options()
         if options is not None:

qiskit/primitives/base/base_result.py

@@ -46,7 +46,7 @@ def __post_init__(self) -> None:
         warn(
             "The class ``BasePrimitiveResult`` is deprecated as of qiskit 1.2. "
             "It will be removed no earlier than 3 months after the release date. "
-            "Use PrimitiveResult class in `qiskit.primitives.containers` instead.",
+            "Use ``PrimitiveResult`` class in ``qiskit.primitives.containers` instead.",
             DeprecationWarning,
         )
 

qiskit/primitives/utils.py

@@ -28,7 +28,10 @@
 from qiskit.utils.deprecation import deprecate_func
 
 
-@deprecate_func(since="1.2", additional_msg="There is no replacement for this.")
+@deprecate_func(
+    since="1.2",
+    additional_msg="There is no replacement for this. Please adjust your code accordingly and use the new utils.",
+)
 def init_circuit(state: QuantumCircuit | Statevector) -> QuantumCircuit:
     """Initialize state by converting the input to a quantum circuit.
 
@@ -47,7 +50,10 @@ def init_circuit(state: QuantumCircuit | Statevector) -> QuantumCircuit:
     return qc
 
 
-@deprecate_func(since="1.2", additional_msg="There is no replacement for this.")
+@deprecate_func(
+    since="1.2",
+    additional_msg="There is no replacement for this. Please adjust your code accordingly and use the new utils.",
+)
 def init_observable(observable: BaseOperator | str) -> SparsePauliOp:
     """Initialize observable by converting the input to a :class:`~qiskit.quantum_info.SparsePauliOp`.
 
@@ -71,7 +77,10 @@ def init_observable(observable: BaseOperator | str) -> SparsePauliOp:
         return SparsePauliOp(observable)
 
 
-@deprecate_func(since="1.2", additional_msg="There is no replacement for this.")
+@deprecate_func(
+    since="1.2",
+    additional_msg="There is no replacement for this. Please adjust your code accordingly and use the new utils.",
+)
 def final_measurement_mapping(circuit: QuantumCircuit) -> dict[int, int]:
     """Return the final measurement mapping for the circuit.