0.10.0.dev8

Release Notes

0.10.0.dev8

New Features

• Add bin_packing, knapsack and multi_knapsack constrained quadratic model generators.

• Add BinaryQuadraticModel.is_almost_equal method for testing approximate equality to other binary quadratic models.

• Add Variables.copy method, implemented as a cpdef method for Cython and Python access.

• Support specifying lower and upper bounds for integer variables in quadratic models:

  • Add lower_bound and upper_bound keyword arguments to QuadraticModel.add_variable.
  • Add QuadraticModel.lower_bound and QuadraticModel.upper_bound methods.

Upgrade Notes

• Remove dimod.utils.LockableDict and dimod.decorators.lockable_method. Also SampleSet.is_writeable can no longer be set to False.

Deprecation Notes

• AdjVectorBQM and AdjDictBQM are deprecated and will be removed in dimod 0.11.0. Use BinaryQuadraticModel with dtype=np.float64 and dtype=object respectively.

• SampleSet.is_writeable is deprecated and now always returns True.

Bug Fixes

• Add support for AdjVectorBQM and AdjDictBQM in ConstrainedQuadraticModel.

• Fix shallow copies of Variables objects when using copy.copy.

• Implement rule of five for dimod::NeighborhoodIterator, dimod::ConstNeighborhoodIterator, and dimod::ConstQuadraticIterator. This fixes double frees caused by the default copy constructor copying information that is not intended to be shared.

• Fix shallow copies of BinaryQuadraticModel with object dtype when using copy.copy.