Neo4j, Graph, Langchain, Llm, OpenAI.
os.environ["OPENAI_API_KEY"] = "sk-" os.environ["NEO4J_URI"] = "neo4j+s://demo.neo4jlabs.com" os.environ["NEO4J_USERNAME"] = "companies" os.environ["NEO4J_PASSWORD"] = "companies" os.environ["NEO4J_DATABASE"] = "companies" embeddings = OpenAIEmbeddings() graph = Neo4jGraph() vector_index =