ChainStringRunMapper

class langchain.smith.evaluation.string_run_evaluator.ChainStringRunMapper

Bases: StringRunMapper

Extract items to evaluate from the run object from a chain.

param input_key: str | None = None

The key from the model Run’s inputs to use as the eval input. If not provided, will use the only input key or raise an error if there are multiple.

param prediction_key: str | None = None

The key from the model Run’s outputs to use as the eval prediction. If not provided, will use the only output key or raise an error if there are multiple.

__call__(run: Run) → Dict[str, str]

Maps the Run to a dictionary.

Parameters:

run (Run)

Return type:

Dict[str, str]

map(run: Run) → Dict[str, str]

Maps the Run to a dictionary.

Parameters:

run (Run)

Return type:

Dict[str, str]

property output_keys: List[str]

The keys to extract from the run.