llm_node.py

from langchain_community.chat_models import ChatOpenAI
from langchain.prompts import PromptTemplate
from langchain.chains import LLMChain
from prompts import PROMPT_TEMPLATE

def llm_node():
    llm = ChatOpenAI(model="gpt-3.5-turbo", temperature=0)
    prompt = PromptTemplate.from_template(PROMPT_TEMPLATE)
    chain = LLMChain(llm=llm, prompt=prompt)
    return chain