LangChain Reference home pageLangChain ReferenceLangChain Reference
  • GitHub
  • Main Docs
Deep Agents
LangChain
LangGraph
Integrations
LangSmith
  • Overview
    • Overview
    • Caches
    • Callbacks
    • Documents
    • Document loaders
    • Embeddings
    • Exceptions
    • Language models
    • Serialization
    • Output parsers
    • Prompts
    • Rate limiters
    • Retrievers
    • Runnables
    • Utilities
    • Vector stores
    MCP Adapters
    Standard Tests
    Text Splitters
    ⌘I

    LangChain Assistant

    Ask a question to get started

    Enter to send•Shift+Enter new line

    Menu

    OverviewCachesCallbacksDocumentsDocument loadersEmbeddingsExceptionsLanguage modelsSerializationOutput parsersPromptsRate limitersRetrieversRunnablesUtilitiesVector stores
    MCP Adapters
    Standard Tests
    Text Splitters
    Language
    Theme
    Pythonlangchain-corerunnablesconfigContextThreadPoolExecutormap
    Method●Since v0.1

    map

    Map a function to multiple iterables.

    Copy
    map(
      self,
      fn: Callable[..., T],
      *iterables: Iterable[Any] = (),
      **kwargs: Any = {}
    ) -> Iterator[T]

    Parameters

    NameTypeDescription
    fn*Callable[..., T]

    The function to map.

    *iterablesIterable[Any]
    Default:()

    The iterables to map over.

    timeout*unknown

    The timeout for the map.

    chunksize*unknown

    The chunksize for the map.

    View source on GitHub