diff --git a/pennylane/devices/qubit/dq_interpreter.py b/pennylane/devices/qubit/dq_interpreter.py
index c2b3c4b4c76..a6d42b851dc 100644
--- a/pennylane/devices/qubit/dq_interpreter.py
+++ b/pennylane/devices/qubit/dq_interpreter.py
@@ -122,6 +122,7 @@ def interpret_operation(self, op):
         self.state = apply_operation(op, self.state, is_state_batched=self.is_state_batched)
         if op.batch_size:
             self.is_state_batched = True
+        return op
 
     def interpret_measurement_eqn(self, eqn: "jax.core.JaxprEqn"):
         if "mcm" in eqn.primitive.name:
diff --git a/pennylane/ops/functions/iterative_qpe.py b/pennylane/ops/functions/iterative_qpe.py
index 98a05b105c7..c21b9489e0f 100644
--- a/pennylane/ops/functions/iterative_qpe.py
+++ b/pennylane/ops/functions/iterative_qpe.py
@@ -28,12 +28,12 @@ def iterative_qpe(base, aux_wire, iters):
     estimation and returns a list of mid-circuit measurements with qubit reset.
 
     Args:
-      base (Operator): the phase estimation unitary, specified as an :class:`~.Operator`
-      aux_wire (Union[Wires, int, str]): the wire to be used for the estimation
-      iters (int): the number of measurements to be performed
+        base (Operator): the phase estimation unitary, specified as an :class:`~.Operator`
+        aux_wire (Union[Wires, int, str]): the wire to be used for the estimation
+        iters (int): the number of measurements to be performed
 
     Returns:
-      list[MeasurementValue]: the abstract results of the mid circuit measurements
+        list[MeasurementValue]: the abstract results of the mid circuit measurements
 
     .. seealso:: :class:`~.QuantumPhaseEstimation`, :func:`~.measure`
 
@@ -46,13 +46,13 @@ def iterative_qpe(base, aux_wire, iters):
         @qml.qnode(dev)
         def circuit():
 
-          # Initial state
-          qml.X(0)
+            # Initial state
+            qml.X(0)
 
-          # Iterative QPE
-          measurements = qml.iterative_qpe(qml.RZ(2.0, wires=[0]), aux_wire=1, iters=3)
+            # Iterative QPE
+            measurements = qml.iterative_qpe(qml.RZ(2.0, wires=[0]), aux_wire=1, iters=3)
 
-          return qml.sample(measurements)
+            return qml.sample(measurements)
 
     .. code-block:: pycon
 
@@ -96,7 +96,7 @@ def cond_func(k):
 
             qml.cond(meas, cond_func)(j)
 
-        g()
+        g()  # pylint: disable=no-value-for-parameter
 
         qml.Hadamard(wires=aux_wire)
         m = qml.measure(wires=aux_wire, reset=True)
@@ -107,4 +107,4 @@ def cond_func(k):
 
         return measurements, target
 
-    return f(measurements, base)[0]
+    return f(measurements, base)[0]  # pylint: disable=no-value-for-parameter