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Updates for Qiskit to Braket circuit conversion #97

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merged 7 commits into from
Jun 5, 2023
Merged

Updates for Qiskit to Braket circuit conversion #97

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ee6e3a0
Probability to Sample result type
urihan May 29, 2023
45f6eba
passes tox lint
urihan May 31, 2023
18a8f24
updates toxlint
urihan May 31, 2023
04df9dc
fixes observable z error but not passses elint
urihan Jun 2, 2023
fe16bbf
Merge branch 'main' into branch1
urihan Jun 2, 2023
7213c7d
unit test added
urihan Jun 5, 2023
cff2d84
final commit with tests
urihan Jun 5, 2023
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7 changes: 4 additions & 3 deletions qiskit_braket_provider/providers/adapter.py
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Expand Up @@ -2,7 +2,7 @@
from typing import Callable, Dict, Iterable, List, Optional, Tuple, Union

from braket.aws import AwsDevice
from braket.circuits import Circuit, Instruction, gates, result_types
from braket.circuits import Circuit, Instruction, gates, result_types, Observable
from braket.device_schema import (
DeviceActionType,
GateModelQpuParadigmProperties,
Expand Down Expand Up @@ -347,11 +347,12 @@ def convert_qiskit_to_braket_circuit(circuit: QuantumCircuit) -> Circuit:
# TODO: change Probability result type for Sample for proper functioning # pylint:disable=fixme
# Getting the index from the bit mapping
quantum_circuit.add_result_type(
result_types.Probability(
result_types.Sample(
observable=Observable,
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@dakk dakk Jun 1, 2023 •
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Class Observable represents a quantum observable, but which one? Since Probability returns probabilities on computation basis, you have to put the computational basis observable

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@urihan urihan Jun 1, 2023 •
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Hi @dakk, Thank you for your comment. In my first commit, I used observable=Observable.Z() for the Probability; however, it was not passing the tox -elint test. I was changing codes to pass the tox -elint, which is why I got rid of the Z() part causing an error in tox -epy39.
So, I think you are right that I have to put a computational basis but not sure how to pass the tox -elint test..

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What was the error of the linter?

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@urihan urihan Jun 1, 2023 •
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@dakk
qiskit_braket_provider/providers/adapter.py:351:31: E1101: Class 'Observable' has no 'Z' member (no-member)

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I wonder if we have to use StandardObservable class instead of just Observable class

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@urihan urihan Jun 1, 2023 •
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Right, seems like I have the same version. For that specific error, I added the comment # pylint:disable=fixme next to the code, and I think it might fix it.

But, now I am getting after running tox -elint

lint run-test: commands[3] | mypy --install-types --non-interactive .
error: --install-types failed (no mypy cache directory)

I tried to follow this instruction on mypy-install-types-mre, but only produces the same error. I might have to spend more time with it.

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Maybe there is a problem with the linter that can't detect dynamically added members; observables are dynamically added to Observable class (from braket side).

There is a workaround:

from braket.circuits import observables
observables.Z()

If the problem is the linter, this should work.

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Thanks a lot for your help here @dakk!

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I wrote a comment here before, but I might have accidentally erased it. Thank you for your help @dakk. I found out I was still getting the same error even after updating with observables.Z(). I was able to get it to work after re-cloning my repository. I decided to just stick with the solution you provided though! I appreciate your help! :)

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I wrote a comment here before, but I might have accidentally erased it. Thank you for your help @dakk. I found out I was still getting the same error even after updating with observables.Z(). I was able to get it to work after re-cloning my repository. I decided to just stick with the solution you provided though! I appreciate your help! :)

Oh, that's weird! It was a pleasure!

target=[
circuit.find_bit(qiskit_gates[1][0]).index,
circuit.find_bit(qiskit_gates[2][0]).index,
]
],
)
)
elif name == "barrier":
Expand Down