TrivialConstraintDeactivator

(class from pyomo.contrib.preprocessing.plugins.deactivate_trivial_constraints)

class pyomo.contrib.preprocessing.plugins.deactivate_trivial_constraints.TrivialConstraintDeactivator(**kwds)[source]

Bases: IsomorphicTransformation

Deactivates trivial constraints.

Trivial constraints take form \(k_1 = k_2\) or \(k_1 \leq k_2\), where \(k_1\) and \(k_2\) are constants. These constraints typically arise when variables are fixed.

Keyword arguments below are specified for the apply_to and create_using functions.

Keyword Arguments:

  • tmp (bool, default=False) – True to store a set of transformed constraints for future reversion of the transformation.

  • ignore_infeasible (bool, default=False) – True to skip over trivial constraints that are infeasible instead of raising an InfeasibleConstraintException.

  • return_trivial (default=[]) – a list to which the deactivated trivialconstraints are appended (side effect)

  • tolerance (NonNegativeFloat, default=1e-13) – tolerance on constraint violations

__init__(**kwds)

Methods

__init__(**kwds)

apply(model, **kwds)

DEPRECATED.

apply_to(model, **kwds)

Apply the transformation to the given model.

create_using(model, **kwds)

Create a new model with this transformation

revert(instance)

Revert constraints deactivated by the transformation.

Attributes

CONFIG

Member Documentation

apply(model, **kwds)

DEPRECATED.

Deprecated since version 4.3.11323: Transformation.apply() has been deprecated. Please use either Transformation.apply_to() for in-place transformations or Transformation.create_using() for transformations that create a new, independent transformed model instance.

apply_to(model, **kwds)

Apply the transformation to the given model.

create_using(model, **kwds)

Create a new model with this transformation

revert(instance)[source]

Revert constraints deactivated by the transformation.

Parameters:

instance – the model instance on which trivial constraints were earlier deactivated.