tff.framework.ExecutorFactory

Interface defining executor factories.

ExecutorFactory should be considered to own the executors it creates; it is responsible for their instantiation and management.

ExecutorFactory exposes two methods, create_executor and clean_up_executors. There is a particular coupling between these two methods; any executor returned by create_executor should not be used after clean_up_executors has been called without reinitialization. That is, create_executor should be called again, and ExecutorFactory will ensure that the returned executor is safe for use.

Methods

`clean_up_executors`

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@abc.abstractmethod
clean_up_executors()

Releases any resources held by the factory.

Note that calling this method may invalidate the state of any executors which have previously been returned by the factory; create_executor should be called again if a new executor which is safe to use is desired.

`create_executor`

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@abc.abstractmethod
create_executor(
    cardinalities: CardinalitiesType
) -> tff.framework.Executor

Abstract method to construct instance of executor_base.Executor.

create_executor must accept a dict mapping placement_literals.PlacementLiterals to ints, and return an executor_base.Executor.

Args
`cardinalities`	a dict mapping instances of `placement_literals.PlacementLiteral` to ints, specifying the population size at each placement.

Returns
Instance of `executor_base.Executor`.