AskTellCMAES

class modcma.asktellcmaes.AskTellCMAES(*args, **kwargs)

Bases: modcma.modularcmaes.ModularCMAES

Ask tell interface for the ModularCMAES.

Methods Summary

ask()	Retrieve the next indivual from the ask_queue.
fitness_func(x)	Overwrite function call for fitness_func, calls register_individual.
register_individual(x)	Add new individuals to self.ask_queue.
run()	Method is disabled on this interface.
sequential_break_conditions(i, f)	Overwrite ~modcma.modularcmaes.ModularCMAES.sequential_break_conditions.
step()	Method is disabled on this interface.
tell(xi, fi)	Process a provided fitness value fi for a given individual xi.

Methods Documentation

ask() → numpy.ndarray

Retrieve the next indivual from the ask_queue.

If the ask_queue is not defined yet, it is defined and mutate is called in order to fill it.

Returns

Return type

np.ndarray

fitness_func(x: numpy.ndarray) → None

Overwrite function call for fitness_func, calls register_individual.

register_individual(x: numpy.ndarray) → None

Add new individuals to self.ask_queue.

Parameters

x (np.ndarray) – The vector to be added to the ask_queue

run()

Method is disabled on this interface.

Raises

NotImplementedError –

sequential_break_conditions(i: int, f: float) → None

Overwrite ~modcma.modularcmaes.ModularCMAES.sequential_break_conditions.

Raises not implemented if sequential selection is enabled, which is not supported in the ask-tell interface.

Parameters

• i (int) – The index of the currently sampled individual in the population

• f (float) – The fitness value of the currently sampled individual

Raises

NotImplementedError – When self.parameters.sequential == True

step()

Method is disabled on this interface.

Raises

NotImplementedError –

tell(xi: numpy.ndarray, fi: float) → None

Process a provided fitness value fi for a given individual xi.

Parameters

• xi (np.ndarray) – An individual previously returned by ask()

• fi (float) – The fitness value for xi

Raises

• RuntimeError – When ask() is not called before tell()

• ValueError – When an unknown xi is provided to the method

Warns

UserWarning – When the same xi is provided more than once