Output transformer chain

Defines a wrapper to chain a list of output transformers.

OutputTransformerChain(transformers, event_emitter=None)

A wrapper to chain a list of output transformers.

The OutputTransformerChain class defines the interface for transforming the output of language models using a chain of output transformers.

Attributes:

Name	Type	Description
transformers	list[BaseOutputTransformer]	The list of output transformers to use.
event_emitter	EventEmitter | None	The event emitter to use for streaming events.

Initializes a new instance of the OutputTransformerChain class.

Parameters:

Name	Type	Description	Default
transformers	list[BaseOutputTransformer]	The list of output transformers to use.	required
event_emitter	EventEmitter | None	The event emitter to use for streaming events. Defaults to None.	None

emit(event) async

Transforms a stream event of a language model and emits it using the event emitter.

This method transforms a stream event of a language model using the chain of output transformers and emits it using the event emitter.

Parameters:

Name	Type	Description	Default
event	Event	The stream event to transform and emit.	required

Raises:

Type	Description
ValueError	If the event emitter is not set.

from_configs(configs, event_emitter=None) classmethod

Create an output transformer chain from a list of output transformer configs.

Parameters:

Name	Type	Description	Default
configs	list[OutputTransformerConfig]	The list of output transformer configs to use.	required
event_emitter	EventEmitter | None	The event emitter to use for streaming events. Defaults to None.	None

Returns:

Name	Type	Description
OutputTransformerChain	OutputTransformerChain	The output transformer chain.

transform(output)

Transforms the output of a language model.

This method transforms the output using the chain of output transformers.

Parameters:

Name	Type	Description	Default
output	LMOutput	The output to transform.	required

Returns:

Name	Type	Description
LMOutput	LMOutput	The transformed output of a language model.