mirror of
https://github.com/kennethreitz/langchain.git
synced 2026-06-05 23:00:18 +00:00
Harrison Chase
c5cc09d4e3
Co-authored-by: Zach Schillaci <40636930+zachschillaci27@users.noreply.github.com>
57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
"""SQL agent."""
|
|
from typing import Any, Dict, List, Optional
|
|
|
|
from langchain.agents.agent import AgentExecutor
|
|
from langchain.agents.agent_toolkits.sql.prompt import SQL_PREFIX, SQL_SUFFIX
|
|
from langchain.agents.agent_toolkits.sql.toolkit import SQLDatabaseToolkit
|
|
from langchain.agents.mrkl.base import ZeroShotAgent
|
|
from langchain.agents.mrkl.prompt import FORMAT_INSTRUCTIONS
|
|
from langchain.callbacks.base import BaseCallbackManager
|
|
from langchain.chains.llm import LLMChain
|
|
from langchain.llms.base import BaseLLM
|
|
|
|
|
|
def create_sql_agent(
|
|
llm: BaseLLM,
|
|
toolkit: SQLDatabaseToolkit,
|
|
callback_manager: Optional[BaseCallbackManager] = None,
|
|
prefix: str = SQL_PREFIX,
|
|
suffix: str = SQL_SUFFIX,
|
|
format_instructions: str = FORMAT_INSTRUCTIONS,
|
|
input_variables: Optional[List[str]] = None,
|
|
top_k: int = 10,
|
|
max_iterations: Optional[int] = 15,
|
|
max_execution_time: Optional[float] = None,
|
|
early_stopping_method: str = "force",
|
|
verbose: bool = False,
|
|
agent_executor_kwargs: Optional[Dict[str, Any]] = None,
|
|
**kwargs: Dict[str, Any],
|
|
) -> AgentExecutor:
|
|
"""Construct a sql agent from an LLM and tools."""
|
|
tools = toolkit.get_tools()
|
|
prefix = prefix.format(dialect=toolkit.dialect, top_k=top_k)
|
|
prompt = ZeroShotAgent.create_prompt(
|
|
tools,
|
|
prefix=prefix,
|
|
suffix=suffix,
|
|
format_instructions=format_instructions,
|
|
input_variables=input_variables,
|
|
)
|
|
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,
|
|
callback_manager=callback_manager,
|
|
verbose=verbose,
|
|
max_iterations=max_iterations,
|
|
max_execution_time=max_execution_time,
|
|
early_stopping_method=early_stopping_method,
|
|
**(agent_executor_kwargs or {}),
|
|
)
|