Chat engine is a high-level interface for having a conversation with your data (multiple back-and-forth instead of a single question & answer). Think ChatGPT, but augmented with your knowledge base.
Conceptually, it is a stateful analogy of a Query Engine. By keeping track of the conversation history, it can answer questions with past context in mind.
If you want to ask standalone question over your data (i.e. without keeping track of conversation history), use Query Engine instead.
Get started with:
chat_engine = index.as_chat_engine() response = chat_engine.chat("Tell me a joke.")
To stream response:
chat_engine = index.as_chat_engine() streaming_response = chat_engine.stream_chat("Tell me a joke.") for token in streaming_response.response_gen: print(token, end="")