Source code for langchain.agents.loading
"""Functionality for loading agents."""
import json
import logging
from pathlib import Path
from typing import Any, List, Optional, Union
import yaml
from langchain_core.language_models import BaseLanguageModel
from langchain.agents.agent import BaseMultiActionAgent, BaseSingleActionAgent
from langchain.agents.tools import Tool
from langchain.agents.types import AGENT_TO_CLASS
from langchain.chains.loading import load_chain, load_chain_from_config
from langchain.utilities.loading import try_load_from_hub
logger = logging.getLogger(__file__)
URL_BASE = "https://raw.githubusercontent.com/hwchase17/langchain-hub/master/agents/"
def _load_agent_from_tools(
    config: dict, llm: BaseLanguageModel, tools: List[Tool], **kwargs: Any
) -> Union[BaseSingleActionAgent, BaseMultiActionAgent]:
    config_type = config.pop("_type")
    if config_type not in AGENT_TO_CLASS:
        raise ValueError(f"Loading {config_type} agent not supported")
    agent_cls = AGENT_TO_CLASS[config_type]
    combined_config = {**config, **kwargs}
    return agent_cls.from_llm_and_tools(llm, tools, **combined_config)
[docs]def load_agent_from_config(
    config: dict,
    llm: Optional[BaseLanguageModel] = None,
    tools: Optional[List[Tool]] = None,
    **kwargs: Any,
) -> Union[BaseSingleActionAgent, BaseMultiActionAgent]:
    """Load agent from Config Dict.
    Args:
        config: Config dict to load agent from.
        llm: Language model to use as the agent.
        tools: List of tools this agent has access to.