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[Stable] Fix fitter selection logic in process tomography (#431) #435
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This commit fixes an issue in the process tomography module. When cvxpy was not installed the module would fail to import. That's because the selection logic was reworked in qiskit-community#422 but never updated in process tomography to reflect that change. Since no CI job runs without cvxpy installed we never caught this edge case. This commit fixes the underlying issue to rework the process tomography fitter selection logic to mirror the changes to state tomography in qiskit-community#422 and then also try and add ci coverage it removes cvxpy from the docs tox job. With warnings set to fatal this should ensure we are always able to import everything and build the docs if cvxpy is not installed. Fixes qiskit-community#429 (cherry picked from commit 01e9070)
mtreinish
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Changelog: Bugfix
mtreinish
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chriseclectic
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Jun 22, 2020
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Summary
This commit fixes an issue in the process tomography module. When cvxpy
was not installed the module would fail to import. That's because the
selection logic was reworked in #422 but never updated in process
tomography to reflect that change. Since no CI job runs without cvxpy
installed we never caught this edge case. This commit fixes the
underlying issue to rework the process tomography fitter selection logic
to mirror the changes to state tomography in #422 and then also try and
add ci coverage it removes cvxpy from the docs tox job. With warnings
set to fatal this should ensure we are always able to import everything
and build the docs if cvxpy is not installed.
Details and comments
Backported from #431
Fixes #429
(cherry picked from commit 01e9070)