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dimod

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dimod is a shared API for samplers. It provides:

• classes for quadratic models---such as the binary quadratic model (BQM) class that contains Ising and QUBO models used by samplers such as the D-Wave system---and higher-order (non-quadratic) models.
• reference examples of samplers and composed samplers.
• abstract base classes <https://docs.python.org/3/library/abc.html>_ for constructing new samplers and composed samplers.

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(For explanations of the terminology, see the Ocean glossary <https://docs.ocean.dwavesys.com/en/stable/concepts/index.html>_.)

Example Usage

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import dimod ...

Construct a problem

bqm = dimod.BinaryQuadraticModel({0: -1, 1: 1}, {(0, 1): 2}, 0.0, dimod.BINARY) ...

Use dimod's brute force solver to solve the problem

sampleset = dimod.ExactSolver().sample(bqm) print(sampleset) 0 1 energy num_oc. 1 1 0 -1.0 1 0 0 0 0.0 1 3 0 1 1.0 1 2 1 1 2.0 1 ['BINARY', 4 rows, 4 samples, 2 variables]

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See the documentation <https://docs.ocean.dwavesys.com/en/stable/docs_dimod/>_ for more examples.

Installation

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Installation from PyPI <https://pypi.org/project/dimod>_:

.. code-block:: bash

pip install dimod

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License

Released under the Apache License 2.0. See LICENSE file.

Contributing

Ocean's contributing guide <https://docs.ocean.dwavesys.com/en/stable/contributing.html>_ has guidelines for contributing to Ocean packages.

dimod includes some formatting customization in the .clang-format <.clang-format> and setup.cfg <setup.cfg> files.

Release Notes

dimod makes use of `reno <https://docs.openstack.org/reno/>`_ to manage its
release notes.

When making a contribution to dimod that will affect users, create a new
release note file by running

.. code-block:: bash

    reno new your-short-descriptor-here

You can then edit the file created under ``releasenotes/notes/``.
Remove any sections not relevant to your changes.
Commit the file along with your changes.

See reno's `user guide <https://docs.openstack.org/reno/latest/user/usage.html>`_
for details.