Variable

class Variable(quadratic_program, name, lowerbound=0, upperbound=1e+20, vartype=VarType.CONTINUOUS)

Bases: QuadraticProgramElement

Representation of a variable.

Creates a new Variable.

The variables is exposed by the top-level QuadraticProgram class in QuadraticProgram.variables. This constructor is not meant to be used externally.

Parameters:

• quadratic_program (Any) – The parent QuadraticProgram.

• name (str) – The variable name.

• lowerbound (float | int) – The variable lowerbound.

• upperbound (float | int) – The variable upperbound.

• vartype (VarType) – The variable type.

Raises:

QiskitOptimizationError – if lowerbound is greater than upperbound.

Attributes

lowerbound	Returns the lowerbound of the variable.
name	Returns the name of the variable.
quadratic_program	Returns the parent QuadraticProgram.
upperbound	Returns the upperbound of the variable.
vartype	Returns the type of the variable.

Methods

as_tuple()

Returns a tuple corresponding to this variable.