ortools.constraint_solver.pywrapcp.Pack Class Reference

Detailed Description

Definition at line 3912 of file pywrapcp.py.

Inheritance diagram for ortools.constraint_solver.pywrapcp.Pack:

Public Member Functions
	__init__ (self, *args, **kwargs)
	AddWeightedSumLessOrEqualConstantDimension (self, *args)
	AddWeightedSumEqualVarDimension (self, *args)
	AddSumVariableWeightsLessOrEqualConstantDimension (self, usage, capacity)
	AddWeightedSumOfAssignedDimension (self, weights, cost_var)
	AddCountUsedBinDimension (self, count_var)
	AddCountAssignedItemsDimension (self, count_var)
	Post (self)
	InitialPropagateWrapper (self)
	DebugString (self)
Public Member Functions inherited from ortools.constraint_solver.pywrapcp.Constraint
	__init__ (self, solver)
	Var (self)
	__repr__ (self)
	__str__ (self)
	__add__ (self, *args)
	__radd__ (self, v)
	__sub__ (self, *args)
	__rsub__ (self, v)
	__mul__ (self, *args)
	__rmul__ (self, v)
	__floordiv__ (self, v)
	__neg__ (self)
	__abs__ (self)
	Square (self)
	__eq__ (self, *args)
	__ne__ (self, *args)
	__ge__ (self, *args)
	__gt__ (self, *args)
	__le__ (self, *args)
	__lt__ (self, *args)
	MapTo (self, vars)
	IndexOf (self, *args)
	__disown__ (self)
Public Member Functions inherited from ortools.constraint_solver.pywrapcp.PropagationBaseObject
	__init__ (self, s)
	solver (self)
	Name (self)
	__disown__ (self)
Public Member Functions inherited from ortools.constraint_solver.pywrapcp.BaseObject
	__init__ (self)
	__str__ (self)
	__repr__ (self)
	__disown__ (self)

Properties
	thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc="The membership flag")
Properties inherited from ortools.constraint_solver.pywrapcp.Constraint
	thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc="The membership flag")
Properties inherited from ortools.constraint_solver.pywrapcp.PropagationBaseObject
	thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc="The membership flag")
Properties inherited from ortools.constraint_solver.pywrapcp.BaseObject
	thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc="The membership flag")

Constructor & Destructor Documentation

__init__()

ortools.constraint_solver.pywrapcp.Pack.__init__	(		self,
		*	args,
		**	kwargs )

Definition at line 3915 of file pywrapcp.py.

Member Function Documentation

AddCountAssignedItemsDimension()

ortools.constraint_solver.pywrapcp.Pack.AddCountAssignedItemsDimension	(		self,
			count_var )

This dimension links 'count_var' to the actual number of items
assigned to a bin in the pack.

Definition at line 3991 of file pywrapcp.py.

AddCountUsedBinDimension()

ortools.constraint_solver.pywrapcp.Pack.AddCountUsedBinDimension	(		self,
			count_var )

This dimension links 'count_var' to the actual number of bins used in the
pack.

Definition at line 3984 of file pywrapcp.py.

AddSumVariableWeightsLessOrEqualConstantDimension()

ortools.constraint_solver.pywrapcp.Pack.AddSumVariableWeightsLessOrEqualConstantDimension	(		self,
			usage,
			capacity )

This dimension imposes:
forall b in bins,
   sum (i in items: usage[i] * is_assigned(i, b)) <= capacity[b]
where is_assigned(i, b) is true if and only if item i is assigned
to the bin b.

This can be used to model shapes of items by linking variables of
the same item on parallel dimensions with an allowed assignment
constraint.

Definition at line 3963 of file pywrapcp.py.

AddWeightedSumEqualVarDimension()

ortools.constraint_solver.pywrapcp.Pack.AddWeightedSumEqualVarDimension	(		self,
		*	args )

*Overload 1:*
This dimension imposes that for all bins b, the weighted sum
(weights[i]) of all objects i assigned to 'b' is equal to loads[b].

|

*Overload 2:*
This dimension imposes that for all bins b, the weighted sum
(weights->Run(i, b)) of all objects i assigned to 'b' is equal to
loads[b].

Definition at line 3948 of file pywrapcp.py.

AddWeightedSumLessOrEqualConstantDimension()

ortools.constraint_solver.pywrapcp.Pack.AddWeightedSumLessOrEqualConstantDimension	(		self,
		*	args )

*Overload 1:*
Dimensions are additional constraints than can restrict what is
possible with the pack constraint. It can be used to set capacity
limits, to count objects per bin, to compute unassigned
penalties...
This dimension imposes that for all bins b, the weighted sum
(weights[i]) of all objects i assigned to 'b' is less or equal
'bounds[b]'.

|

*Overload 2:*
This dimension imposes that for all bins b, the weighted sum
(weights->Run(i)) of all objects i assigned to 'b' is less or
equal to 'bounds[b]'. Ownership of the callback is transferred to
the pack constraint.

|

*Overload 3:*
This dimension imposes that for all bins b, the weighted sum
(weights->Run(i, b) of all objects i assigned to 'b' is less or
equal to 'bounds[b]'. Ownership of the callback is transferred to
the pack constraint.

Definition at line 3919 of file pywrapcp.py.

AddWeightedSumOfAssignedDimension()

ortools.constraint_solver.pywrapcp.Pack.AddWeightedSumOfAssignedDimension	(		self,
			weights,
			cost_var )

This dimension enforces that cost_var == sum of weights[i] for
all objects 'i' assigned to a bin.

Definition at line 3977 of file pywrapcp.py.

DebugString()

ortools.constraint_solver.pywrapcp.Pack.DebugString

(

self

)

Reimplemented from ortools.constraint_solver.pywrapcp.Constraint.

Definition at line 4004 of file pywrapcp.py.

InitialPropagateWrapper()

ortools.constraint_solver.pywrapcp.Pack.InitialPropagateWrapper

(

self

)

This method performs the initial propagation of the
constraint. It is called just after the post.

Reimplemented from ortools.constraint_solver.pywrapcp.Constraint.

Definition at line 4001 of file pywrapcp.py.

Post()

ortools.constraint_solver.pywrapcp.Pack.Post

(

self

)

This method is called when the constraint is processed by the
solver. Its main usage is to attach demons to variables.

Reimplemented from ortools.constraint_solver.pywrapcp.Constraint.

Definition at line 3998 of file pywrapcp.py.

Property Documentation

thisown

ortools.constraint_solver.pywrapcp.Pack.thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc="The membership flag")

static

Definition at line 3913 of file pywrapcp.py.

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The documentation for this class was generated from the following file:

• build/python/ortools/constraint_solver/pywrapcp.py