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Number of execution counter in AWS qubit device fixed #114

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Number of execution counter in AWS qubit device fixed #114

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7a463c1
Updating number execution counter correctly when using AWS Qubit Device
Oct 15, 2022
0dcd9ba
Added Unit Test for text_number_executions
Oct 15, 2022
d255b60
fixed code format
Oct 15, 2022
61dd745
Merge branch 'main' into main
speller26 Mar 2, 2023
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5 changes: 5 additions & 0 deletions src/braket/pennylane_plugin/braket_device.py
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Original file line number Diff line number Diff line change
Expand Up @@ -306,6 +306,10 @@ def execute(self, circuit: QuantumTape, compute_gradient=False, **run_kwargs) ->
tracking_data = self._tracking_data(self._task)
self.tracker.update(executions=1, shots=self.shots, **tracking_data)
self.tracker.record()

# increment counter for number of executions of device
self._num_executions += 1

return self._braket_to_pl_result(braket_result, circuit)

def apply(
Expand Down Expand Up @@ -499,6 +503,7 @@ def batch_execute(self, circuits, **run_kwargs):

# Update the tracker before raising an exception further if some circuits do not complete.
finally:
self._num_executions += len(task_batch.tasks)
if self.tracker.active:
for task in task_batch.tasks:
tracking_data = self._tracking_data(task)
Expand Down
15 changes: 15 additions & 0 deletions test/unit_tests/test_braket_device.py
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Expand Up @@ -501,6 +501,21 @@ def test_execute_with_gradient(
assert (results[0][1] == expected_pl_result[0][1]).all()


@patch.object(AwsDevice, "run")
def test_number_executions(mock_run):
"""Asserts tracker stores information during execute when active"""
mock_run.side_effect = [TASK, SIM_TASK, SIM_TASK, TASK]
dev = _aws_device(wires=4, foo="bar")

with QuantumTape() as circuit:
qml.Hadamard(wires=0)
qml.probs(wires=(0,))
dev.execute(circuit)
dev.execute(circuit)

assert dev.num_executions == 2


@patch.object(AwsDevice, "run")
def test_execute_tracker(mock_run):
"""Asserts tracker stores information during execute when active"""
Expand Down