1 core.expressions.Variable

core.expressions.Variable(
    name,
    lb=None,
    ub=None,
    domain='continuous',
    obj=0.0,
    sort_key=None,
    metadata_callback=None,
)

A decision variable in an optimization problem.

1.1 Parameters

Name	Type	Description	Default
name	str	Unique identifier for this variable.	required
lb	float | None	Lower bound (None for unbounded).	None
ub	float | None	Upper bound (None for unbounded).	None
domain	Literal['continuous', 'integer', 'binary']	Variable type - ‘continuous’, ‘integer’, or ‘binary’.	'continuous'
obj	float | int	Mutable linear objective coefficient. Changes are applied on the next solve, including when solver data has already been cached.	0.0

1.2 Example

x = Variable(“x”, lb=0, ub=10) y = Variable(“y”, domain=“binary”) x.evaluate({“x”: 5.0}) 5.0