| import os | |
| import streamlit as st | |
| def ensure_openai_key(env_var: str = "OPENAI_API_KEY") -> bool: | |
| """Ensure the specified OpenAI API key environment variable is present.""" | |
| if not os.environ.get(env_var): | |
| st.error(f"{env_var} is not set.") | |
| return False | |
| return True | |