_load_agent_from_file() — langchain Function Reference

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

Function python AgentOrchestration ToolInterface calls 1 called by 1

Entity Profile

AgentOrchestration→ ToolInterface→ _load_agent_from_file() — langchain Function Reference

Dependency Diagram

graph TD
  36f609ad_1082_989b_c5d3_f0de4c508863["_load_agent_from_file()"]
  7f3891e0_2de6_b9ba_e16e_a9b4c825778b["loading.py"]
  36f609ad_1082_989b_c5d3_f0de4c508863 -->|defined in| 7f3891e0_2de6_b9ba_e16e_a9b4c825778b
  fbe78043_6ca9_accc_3a94_ee89e75c77c5["load_agent()"]
  fbe78043_6ca9_accc_3a94_ee89e75c77c5 -->|calls| 36f609ad_1082_989b_c5d3_f0de4c508863
  d135c558_d211_f5bf_c272_7dfd2fe8cc5b["load_agent_from_config()"]
  36f609ad_1082_989b_c5d3_f0de4c508863 -->|calls| d135c558_d211_f5bf_c272_7dfd2fe8cc5b
  style 36f609ad_1082_989b_c5d3_f0de4c508863 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/agents/loading.py lines 129–148

def _load_agent_from_file(
    file: str | Path,
    **kwargs: Any,
) -> BaseSingleActionAgent | BaseMultiActionAgent:
    """Load agent from file."""
    valid_suffixes = {"json", "yaml"}
    # Convert file to Path object.
    file_path = Path(file) if isinstance(file, str) else file
    # Load from either json or yaml.
    if file_path.suffix[1:] == "json":
        with file_path.open() as f:
            config = json.load(f)
    elif file_path.suffix[1:] == "yaml":
        with file_path.open() as f:
            config = yaml.safe_load(f)
    else:
        msg = f"Unsupported file type, must be one of {valid_suffixes}."
        raise ValueError(msg)
    # Load the agent from the config now.
    return load_agent_from_config(config, **kwargs)