Dimod

Fixes

- Fix C++ ``ConstrainedQuadraticModel.remove_variable()`` method. Previously it would segmentation fault.

New Features

- Add C++ `dimod::ConstrainedQuadraticModel` class.

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- Make `BinaryQuadraticModel.vartype` callable. This allows for more uniform syntax between binary quadratic models, quadratic models and constrained quadratic models.

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- Replace current `ConstrainedQuadraticModel` implementation with one implemented in Cython.

Prelude

The entire C++ library has been rewritten for performance and consistency.

New Features

- New `dimod::abc::QuadraticModelBase` abstract base class.

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- Better performance for linear models.

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- Add `dimod.cyqmbase.cyQMBase_template` Cython class to serve as an abstract base class for Cython quadratic models.

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- Break `dimod/libcpp.pxd` into a full Cython subpackage to mirror the structure under `dimod/include/`. This allows for better organization, and less need to recompile all Cython files when changing parts of the C++ library. Packages that depend on dimod are still encouraged to use the `from dimod.libcpp cimport ...` syntax.

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- Build wheels for Python 3.11.

Upgrade Notes

- Rewrite `dimod::QuadraticModelBase` and move it to `dimod::abc::QuadraticModelBase` in `abc.h`.

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- Move `dimod::Vartype`, `dimod::vartype_info`, and `` dimod::vartype_limits` to ``vartypes.h\`\`.

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- Remove the `dimod::Neighborhood` class.

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- Remove `iterators.h`.

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- Move `dimod::BinaryQuadraticModel` to `binary_quadratic_model.h`.

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- Remove `dimod.binary.cybqm.cyBQMBase` class.

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- Remove `dimod.quadratic.cyqm.cyQMBase` class.

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- Build `manylinux2014` wheels. Previously we built `manylinux2010`.

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- Build `arm64` and `x86_64` wheels for macos. Previously we built `x86_64` and `universal2`.

New Features

- Add `Variables._remove()` method.

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- Added `weight` and <span class="title-ref">penalty</span> parameters on `ConstrainedQuadraticModel.add_constraint` methods to encoded weighted constraints.

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- Add constrained quadratic model serialization version 1.3 to support soft constraints.