dimod.BinaryQuadraticModel.empty

classmethod BinaryQuadraticModel.empty(vartype)

Create an empty binary quadratic model.

Equivalent to instantiating a BinaryQuadraticModel with no bias values and zero offset for the defined vartype:

BinaryQuadraticModel({}, {}, 0.0, vartype)

Parameters:vartype (Vartype/str/set) –

Variable type for the binary quadratic model. Accepted input values:

• Vartype.SPIN, 'SPIN', {-1, 1}
• Vartype.BINARY, 'BINARY', {0, 1}

Examples

This example creates an empty binary quadratic model.

>>> bqm = dimod.BinaryQuadraticModel.empty(dimod.BINARY)
>>> any(bqm.linear)
False
>>> any(bqm.quadratic)
False
>>> bqm.offset
0.0