Dimod

New Features

- Add C++ `QuadraticModelBase::remove_interactions()` method.
- Add `dimod.generators.random_binary_paint_shop_problem()` binary paint shop problem generator.
- Add an abstract method `QuadraticViewsMixin.add_quadratic()`.
- Add a method `QuadraticViewsMixin.add_quadratic_from()` to add quadratic interactions. This method is intended to be used as follows: `ConstrainedQuadraticModel.objective.add_quadratic_from()`, similarly to `ConstrainedQuadraticModel.objective.add_linear_from()`.
- Add `check_overlaps` keyword argument to `ConstrainedQuadraticModel.add_discrete()`, see [\1364](https://github.com/dwavesystems/dimod/issues/1364).

Upgrade Notes

- All sublcasses of `QuadraticViewsMixin`, including `ObjectiveView`, `QuadraticModel` and `BinaryQuadraticModel`, now require to have the method `add_quadratic()`.

New Features

- Add C++ `dimod::abc::QuadraticModelBase::remove_variables()` method
and accompanying overloads.
- Speed up C++ `dimod::Expression::remove_variables()` method.

New Features
- Build wheels for Python 3.12.
- Build C++ extensions with Cython 3.

New Features

- Add `mimo()` function for generating a multi-input multiple-output (MIMO) channel-decoding problem.
- Add `coordinated_multipoint()` function for generating a coordinated multi-point (CoMP) decoding problem.

New Features

- Make `SampleSet.relabel_variables()` non-blocking in all cases. Previously it would block when `inplace=False`.

- Implement `SampleSet` serialization schema version 3.2.0.

Version 3.2.0 replaces `float` values that represent integers with `int` in the `"data"` field of any arrays returned by `SampleSet.to_serializable()`. In some pathological cases this can result in a much smaller representation when the data dictionaries are json-serialized by avoiding the redundant `.0` appended to every value.

This is a backwards-compatible change.

- Add `penalization_method` parameter to `BinaryQuadraticModel.add_linear_inequality_constraint()`. It allows the use of unbalanced penalization <https://arxiv.org/abs/2211.13914> instead of the slack variables method for the inequality constraints.

Bug Fixes

- Fix the behavior of `SampleSet.relabel_variables()` when `inplace=True`. Previously the method incorrectly returned a copy when the sample set was unresolved.

Bug Fixes

- Fix ``dimod::ConstrainedQuadraticModel::fix_variables()`` C++ method to work correctly with quadratic objectives and constraints. This fixes a bug introduced in dimod 0.12.5. See [1351](https://github.com/dwavesystems/dimod/issues/1351).