dimod.QuadraticModel.quadratic

property QuadraticModel.quadratic: Quadratic

Quadratic biases as a flat mapping.

Accessed like a dict, where keys are 2-tuples of variables, which represent an interaction and values are the quadratic biases.

Examples

>>> from dimod import QuadraticModel, Binary, Integer
>>> qm = QuadraticModel()
>>> qm.add_variables_from('BINARY', ['x', 'y'])
>>> qm.add_variables_from('INTEGER', ['i', 'j'])
>>> qm.add_quadratic('i', 'j', 2)
>>> qm.add_quadratic('x', 'i', -1)
>>> qm.quadratic
{('i', 'x'): -1.0, ('j', 'i'): 2.0}