from langchain.chat_models import ChatOpenAI
from pydantic import BaseModel, Field
from langchain.document_loaders import UnstructuredURLLoader
from langchain.chains.openai_functions import create_extraction_chain_pydantic

class LLMItem(BaseModel):
    title: str = Field(description="The simple and concise title of the product")
    description: str = Field(description="The description of the product")

def main():

    llm = ChatOpenAI(temperature=0, model="gpt-3.5-turbo-16k")
    chain = create_extraction_chain_pydantic(pydantic_schema=LLMItem, llm=llm)

    loader = UnstructuredURLLoader(urls=["https://www.ebay.com/itm/115834603826"])
    data = loader.load()
    llm_item = chain.run(data)
    print(llm_item)

if __name__ == "__main__":
    main()