Deprecate passing None to DAGCircuit appenders
#10752
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This has been against the documented typing of the functions for some time, but some scheduling methods have mistakenly been passing `None`. There is no need to support `None` here; the empty tuple `()` is equally immutable and a CPython singleton, so there are neither mutability nor memory benefits to supporting both, and removing `None` as an input is a simple way to remove a(n admittedly cheap) branch from the appender methods.
jakelishman
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Changelog: Deprecation
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Pull Request Test Coverage Report for Build 6039053966
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1ucian0
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Oct 16, 2023
1ucian0
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Oct 16, 2023
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That latest merge commit didn't quite work right - I've just forced pushed a fixed merge commit in 7502f16. |
1ucian0
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Oct 18, 2023
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Summary
This has been against the documented typing of the functions for some time, but some scheduling methods have mistakenly been passing
None. There is no need to supportNonehere; the empty tuple()is equally immutable and a CPython singleton, so there are neither mutability nor memory benefits to supporting both, and removingNoneas an input is a simple way to remove a(n admittedly cheap) branch from the appender methods.Details and comments
I also made Qiskit/qiskit-ibm-provider#721 to fix the same mistake that the IBM Provider inherited from Terra.