LlamaIndex (agent workflows): features, install and latest version

from dotenv import load_dotenv

load_dotenv()

from llama_index.llms.openai import OpenAI

from llama_index.core.agent.workflow import FunctionAgent

def multiply(a: float, b: float) -> float:
    """Multiply two numbers and returns the product"""
    return a * b

def add(a: float, b: float) -> float:
    """Add two numbers and returns the sum"""
    return a + b

llm = OpenAI(model="gpt-4o-mini")

workflow = FunctionAgent(
    tools=[multiply, add],
    llm=llm,
    system_prompt="You are an agent that can perform basic mathematical operations using tools.",
)

response = await workflow.run(user_msg="What is 20+(2*4)?")
print(response)