langchain-classic

import os from langchain.llms import OpenAI from langchain.prompts import PromptTemplate from langchain.chains import LLMChain # Set your OpenAI API key as an environment variable (e.g., export OPENAI_API_KEY="sk-...") # For this example, we use os.environ.get to prevent errors if the key is not set. openai_api_key = os.environ.get('OPENAI_API_KEY', '') if not openai_api_key: print("Warning: OPENAI_API_KEY environment variable not set. Please set it to run the example.") print("Skipping LLM interaction.") else: llm = OpenAI(openai_api_key=openai_api_key, temperature=0.7) prompt = PromptTemplate( input_variables=["topic"], template="Tell me a short, funny joke about {topic}." ) chain = LLMChain(llm=llm, prompt=prompt) try: response = chain.run("developers") print(f"Joke about developers:\n{response}") except Exception as e: print(f"An error occurred during LLM interaction: {e}") print("Please ensure your OPENAI_API_KEY is valid and has access to the OpenAI API.")