Lang_chain.py

from langchain_google_genai import ChatGoogleGenerativeAI
from dotenv import load_dotenv
import os
load_dotenv()
api_key=os.getenv("GOOGLE_API_KEY")
model="gemini-2.5-flash"
def hello_langchain(prompt, history):
    llm = ChatGoogleGenerativeAI(api_key=api_key, model=model)
    response = llm.invoke(prompt)
    return response.content

if __name__=="__main__":
    print(hello_langchain("Hello"))