pip install langchain openai pydantic serpapi

export OPENAI_API_KEY="your-api-key"
export SERPAPI_API_KEY="your-serp-key"

from langchain.tools import Tool
from langchain.utilities import SerpAPIWrapper

search = SerpAPIWrapper()
google_tool = Tool(
    name="Google Search",
    func=search.run,
    description="Useful for finding current events or factual info."
)

from langchain.agents import initialize_agent, AgentType
from langchain.chat_models import ChatOpenAI

llm = ChatOpenAI(temperature=0, model_name="gpt-4")
agent = initialize_agent(
    tools=[google_tool],
    llm=llm,
    agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
    verbose=True,
)

result = agent.run("Find 3 trending AI startups and summarize what they do.")
print(result)

from langchain.memory import ConversationBufferMemory

memory = ConversationBufferMemory(memory_key="chat_history")
agent = initialize_agent(
    tools=[google_tool],
    llm=llm,
    agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
    memory=memory,
    verbose=True,
)