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Fix a transpile issue of BackendSampler #9236

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merged 6 commits into from
Dec 6, 2022
Merged

Fix a transpile issue of BackendSampler #9236

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4c195e2
fix an issue of transpile of BackendSampler
t-imamichi Dec 2, 2022
6ace743
optimize
t-imamichi Dec 5, 2022
5ab9b8d
add reno
t-imamichi Dec 5, 2022
f0426d1
Merge branch 'fix-bs2' into fix-backend-sampler
t-imamichi Dec 5, 2022
f2a24c9
updated test
t-imamichi Dec 6, 2022
a1e3ba6
Merge branch 'main' into fix-backend-sampler
mergify[bot] Dec 6, 2022
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4 changes: 3 additions & 1 deletion qiskit/primitives/backend_sampler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,9 @@ def transpiled_circuits(self) -> list[QuantumCircuit]:
"""
if self._skip_transpilation:
self._transpiled_circuits = list(self._circuits)
elif self._transpiled_circuits is None:
elif self._transpiled_circuits is None or len(self._transpiled_circuits) != len(
self._circuits
):
# Only transpile if have not done so yet
self._transpile()
return self._transpiled_circuits
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13 changes: 13 additions & 0 deletions test/python/primitives/test_backend_sampler.py
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Expand Up @@ -319,6 +319,19 @@ def test_primitive_job_size_limit_backend_v1(self):
self.assertDictAlmostEqual(result.quasi_dists[0], {0: 1}, 0.1)
self.assertDictAlmostEqual(result.quasi_dists[1], {1: 1}, 0.1)

def test_sequential_run(self):
"""Test sequential run."""
qc = QuantumCircuit(1)
qc.measure_all()
qc2 = QuantumCircuit(1)
qc2.x(0)
qc2.measure_all()
sampler = BackendSampler(backend=FakeNairobi())
result = sampler.run([qc]).result()
result2 = sampler.run([qc2]).result()
self.assertDictAlmostEqual(result.quasi_dists[0], {0: 1}, 0.1)
self.assertDictAlmostEqual(result2.quasi_dists[0], {1: 1}, 0.1)


if __name__ == "__main__":
unittest.main()