이 노트북은 Google Finance Tool을 사용하여 Google Finance 페이지에서 정보를 가져오는 방법을 다룹니다. SerpApi key를 얻으려면 다음에서 가입하세요: serpapi.com/users/sign_up. LangChain과 함께 tool을 사용하려면 다음 패키지를 설치하세요 
pip install -qU google-search-results langchain-community

Note: you may need to restart the kernel to use updated packages.
그런 다음 환경 변수 SERPAPI_API_KEY를 SerpApi key로 설정하거나 wrapper에 인자로 serp_api_key=“your secret key”를 전달하세요. 
import os

os.environ["SERPAPI_API_KEY"] = ""

from langchain_community.tools.google_finance import GoogleFinanceQueryRun
from langchain_community.utilities.google_finance import GoogleFinanceAPIWrapper

tool = GoogleFinanceQueryRun(api_wrapper=GoogleFinanceAPIWrapper())

tool.run("Google")

'\nQuery: Google\nstock: GOOGL:NASDAQ\nprice: $159.96\npercentage: 0.94\nmovement: Up\nus: price = 42210.57, movement = Down\neurope: price = 23638.56, movement = Up\nasia: price = 38183.26, movement = Up\n'
Google Finance tool을 사용하는 agent를 생성하려면 LangGraph를 설치하세요 
pip install -qU langgraph langchain-openai

Note: you may need to restart the kernel to use updated packages.
그리고 create_agent 기능을 사용하여 ReAct agent를 초기화하세요. 또한 OpenAI의 chat model에 액세스하려면 OPEN_API_KEY를 설정해야 합니다(platform.openai.com 방문). 
import os

os.environ["OPENAI_API_KEY"] = ""
os.environ["SERP_API_KEY"] = ""

from langchain.chat_models import init_chat_model

model = init_chat_model("gpt-4o-mini", model_provider="openai")

from langchain_community.agent_toolkits.load_tools import load_tools

tools = load_tools(["google-scholar", "google-finance"], llm=model)

from langchain.agents import create_agent


agent = create_agent(model, tools)

events = agent.stream(
    {"messages": [("user", "What is Google's stock?")]},
    stream_mode="values",
)
for event in events:
    event["messages"][-1].pretty_print()

================================ Human Message =================================

What is Google's stock?
================================== Ai Message ==================================
Tool Calls:
  google_finance (call_8m0txCtxNuQaAv9UlomPhSA1)
 Call ID: call_8m0txCtxNuQaAv9UlomPhSA1
  Args:
    query: Google
================================= Tool Message =================================
Name: google_finance


Query: Google
stock: GOOGL:NASDAQ
price: $159.96
percentage: 0.94
movement: Up
us: price = 42210.57, movement = Down
europe: price = 23638.56, movement = Up
asia: price = 38183.26, movement = Up

================================== Ai Message ==================================

Google's stock, listed as GOOGL on NASDAQ, is currently priced at $159.96, with a movement up by 0.94%.
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