# LSBlackBoxEvaluationPoint Class¶

class localsolver.LSBlackBoxEvaluationPoint

An evaluation point associated with a black-box function.

Evaluation points are used to specify known points for a function in advance. It can be useful to warm-start the solver when the function is particularly expensive to evaluate, or if you already have a good estimate of the optimal point.

Note: This information is used by the solver to drive the solution process. You must be careful about the data you provide: if an incorrect value is given, the solver may have an unexpected behavior.

Since: 10.0 LSBlackBoxContext.CreateEvaluationPoint LSBlackBoxContext.GetEvaluationPoint

## Summary¶

 AddArgument Adds an integer argument with the given value. SetArgument Sets the value of the argument at the given position. SetReturnValue Sets the return value of this evaluation point. IsIntReturnValue Returns true if the black-box function associated with this evaluation point is an integer function, false otherwise. IsDoubleReturnValue Returns true if the black-box function associated with this evaluation point is a double function, false otherwise. IsIntArgument Returns true if the argument at this given position is an integer, false otherwise. IsDoubleArgument Returns true if the argument at this given position is a double, false otherwise. GetIntReturnValue Returns the return value of this evaluation point. GetDoubleReturnValue Returns the return value of this evaluation point. GetIntArgument Returns the value of the argument at the given position. GetDoubleArgument Returns the value of the argument at the given position.

## Instance methods¶

void AddArgument(long value)

Adds an integer argument with the given value. Only allowed if the associated decision variable is an integer or a boolean. Only allowed in state Stopped.

Arguments: value – Value of the argument.
void AddArgument(double value)

Adds a double argument with the given value. Only allowed if the associated decision variable is a double. Only allowed in state Stopped.

Arguments: value – Value of the argument.
void SetArgument(int pos, long value)

Sets the value of the argument at the given position. Only allowed if this argument is an integer or a boolean. Only allowed in state Stopped.

Arguments: pos – Position in the argument list. value – Value of the argument.
void SetArgument(int pos, double value)

Sets the value of the argument at the given position. Only allowed if this argument is a double. Only allowed in state Stopped.

Arguments: pos – Position in the argument list. value – Value of the argument.
void SetReturnValue(long value)

Sets the return value of this evaluation point. Only allowed if the black-box function associated with this evaluation point is an integer function. Only allowed in state Stopped.

Arguments: value – Return value of this point.
void SetReturnValue(double value)

Sets the return value of this evaluation point. Only allowed if the black-box function associated with this evaluation point is a double function. Only allowed in state Stopped.

Arguments: value – Return value of this point.
bool IsIntReturnValue()

Returns true if the black-box function associated with this evaluation point is an integer function, false otherwise. You can retrieve the value with LSBlackBoxEvaluationPoint.GetIntReturnValue(). Only allowed in state Stopped.

Returns: True if the return value is an integer. bool
bool IsDoubleReturnValue()

Returns true if the black-box function associated with this evaluation point is a double function, false otherwise. You can retrieve the value with LSBlackBoxEvaluationPoint.GetDoubleReturnValue(). Only allowed in state Stopped.

Returns: True if the return value is a double. bool
bool IsIntArgument(int pos)

Returns true if the argument at this given position is an integer, false otherwise. You can retrieve the value with LSBlackBoxEvaluationPoint.GetIntArgument(int pos). Only allowed in state Stopped.

Arguments: pos – Position in the argument list. True if the argument at this given position is an integer. bool
bool IsDoubleArgument(int pos)

Returns true if the argument at this given position is a double, false otherwise. You can retrieve the value with LSBlackBoxEvaluationPoint.GetDoubleArgument(int pos). Only allowed in state Stopped.

Arguments: pos – Position in the argument list. True if the argument at this given position is a double. bool
long GetIntReturnValue()

Returns the return value of this evaluation point. Only allowed if the black-box function associated with this evaluation point is an integer function. Only allowed in state Stopped.

Returns: Return value of this point. long
double GetDoubleReturnValue()

Returns the return value of this evaluation point. Only allowed if the black-box function associated with this evaluation point is a double function. Only allowed in state Stopped.

Returns: Return value of this point. double
long GetIntArgument(int pos)

Returns the value of the argument at the given position. Only allowed if this argument is an integer or a boolean. Only allowed in state Stopped.

Arguments: pos – Position in the argument list. Value of the argument. long
double GetDoubleArgument(int pos)

Returns the value of the argument at the given position. Only allowed if this argument is a double. Only allowed in state Stopped.

Arguments: pos – Position in the argument list. Value of the argument. double