load_agent() — langchain Function Reference

Architecture documentation for the load_agent() function in loading.py from the langchain codebase.

Function python AgentOrchestration ActionLogic calls 1

Entity Profile

AgentOrchestration→ ActionLogic→ load_agent() — langchain Function Reference

Dependency Diagram

graph TD
  fbe78043_6ca9_accc_3a94_ee89e75c77c5["load_agent()"]
  7f3891e0_2de6_b9ba_e16e_a9b4c825778b["loading.py"]
  fbe78043_6ca9_accc_3a94_ee89e75c77c5 -->|defined in| 7f3891e0_2de6_b9ba_e16e_a9b4c825778b
  36f609ad_1082_989b_c5d3_f0de4c508863["_load_agent_from_file()"]
  fbe78043_6ca9_accc_3a94_ee89e75c77c5 -->|calls| 36f609ad_1082_989b_c5d3_f0de4c508863
  style fbe78043_6ca9_accc_3a94_ee89e75c77c5 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/agents/loading.py lines 102–126

def load_agent(
    path: str | Path,
    **kwargs: Any,
) -> BaseSingleActionAgent | BaseMultiActionAgent:
    """Unified method for loading an agent from LangChainHub or local fs.

    Args:
        path: Path to the agent file.
        kwargs: Additional keyword arguments passed to the agent executor.

    Returns:
        An agent executor.

    Raises:
        RuntimeError: If loading from the deprecated github-based
            Hub is attempted.
    """
    if isinstance(path, str) and path.startswith("lc://"):
        msg = (
            "Loading from the deprecated github-based Hub is no longer supported. "
            "Please use the new LangChain Hub at https://smith.langchain.com/hub "
            "instead."
        )
        raise RuntimeError(msg)
    return _load_agent_from_file(path, **kwargs)