chain#

langchain_core.runnables.base.chain(
func:Callable[[Input],Coroutine[Any,Any,Output]],
)→Runnable[Input,Output][source]#
langchain_core.runnables.base.chain(
func:Callable[[Input],Iterator[Output]],
)→Runnable[Input,Output]
langchain_core.runnables.base.chain(
func:Callable[[Input],AsyncIterator[Output]],
)→Runnable[Input,Output]
langchain_core.runnables.base.chain(
func:Callable[[Input],Output],
)→Runnable[Input,Output]

Decorate a function to make it a Runnable.

Sets the name of the Runnable to the name of the function.Any runnables called by the function will be traced as dependencies.

Parameters:

func – A callable.

Returns:

A Runnable.

Example:

fromlangchain_core.runnablesimportchainfromlangchain_core.promptsimportPromptTemplatefromlangchain_openaiimportOpenAI@chaindefmy_func(fields):prompt=PromptTemplate("Hello,{name}!")llm=OpenAI()formatted=prompt.invoke(**fields)forchunkinllm.stream(formatted):yieldchunk

Examples using chain

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