Method bind

libs/core/langchain_core/runnables/base.py:1218–1253

Bind arguments to a Runnable, returning a new Runnable. Useful when a runnable in a chain requires an argument that is not in the output of the previous runnable or included in the user input. Example: .. code-block:: python from langchain_com

(self, **kwargs: Any)

                yield output

    def bind(self, **kwargs: Any) -> Runnable[Input, Output]:
        """
        Bind arguments to a Runnable, returning a new Runnable.

        Useful when a runnable in a chain requires an argument that is not
        in the output of the previous runnable or included in the user input.

        Example:

        .. code-block:: python

            from langchain_community.chat_models import ChatOllama
            from langchain_core.output_parsers import StrOutputParser

            llm = ChatOllama(model='llama2')

            # Without bind.
            chain = (
                llm
                | StrOutputParser()
            )

            chain.invoke("Repeat quoted words exactly: 'One two three four five.'")
            # Output is 'One two three four five.'

            # With bind.
            chain = (
                llm.bind(stop=["three"])
                | StrOutputParser()
            )

            chain.invoke("Repeat quoted words exactly: 'One two three four five.'")
            # Output is 'One two'

        """
        return RunnableBinding(bound=self, kwargs=kwargs, config={})

    def with_config(
        self,