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#

# Source code for langchain.agents.agent_toolkits.vectorstore.base

    """VectorStore agent."""
    from typing import Any, Optional

    from langchain.agents.agent import AgentExecutor
    from langchain.agents.agent_toolkits.vectorstore.prompt import PREFIX, ROUTER_PREFIX
    from langchain.agents.agent_toolkits.vectorstore.toolkit import (
        VectorStoreRouterToolkit,
        VectorStoreToolkit,
    )
    from langchain.agents.mrkl.base import ZeroShotAgent
    from langchain.callbacks.base import BaseCallbackManager
    from langchain.chains.llm import LLMChain
    from langchain.llms.base import BaseLLM

    def create_vectorstore_agent(
        llm: BaseLLM,
        toolkit: VectorStoreToolkit,
        callback_manager: Optional[BaseCallbackManager] = None,
        prefix: str = PREFIX,
        verbose: bool = False,
        **kwargs: Any,
    ) -> AgentExecutor:
        """Construct a vectorstore agent from an LLM and tools."""
        tools = toolkit.get_tools()
        prompt = ZeroShotAgent.create_prompt(tools, prefix=prefix)
        llm_chain = LLMChain(
            llm=llm,
            prompt=prompt,
            callback_manager=callback_manager,
        )
        tool_names = [tool.name for tool in tools]
        agent = ZeroShotAgent(llm_chain=llm_chain, allowed_tools=tool_names, **kwargs)
        return AgentExecutor.from_agent_and_tools(agent=agent, tools=tools, verbose=verbose)

    def create_vectorstore_router_agent(
        llm: BaseLLM,
        toolkit: VectorStoreRouterToolkit,
        callback_manager: Optional[BaseCallbackManager] = None,
        prefix: str = ROUTER_PREFIX,
        verbose: bool = False,
        **kwargs: Any,
    ) -> AgentExecutor:
        """Construct a vectorstore router agent from an LLM and tools."""
        tools = toolkit.get_tools()
        prompt = ZeroShotAgent.create_prompt(tools, prefix=prefix)
        llm_chain = LLMChain(
            llm=llm,
            prompt=prompt,
            callback_manager=callback_manager,
        )
        tool_names = [tool.name for tool in tools]
        agent = ZeroShotAgent(llm_chain=llm_chain, allowed_tools=tool_names, **kwargs)
        return AgentExecutor.from_agent_and_tools(agent=agent, tools=tools, verbose=verbose)