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Updated 2 months ago

From the help docs https gpt index

From the help docs https://gpt-index.readthedocs.io/en/v0.7.16/examples/chat_engine/chat_engine_context.html can someone point me to an example of updating memory = ChatMemoryBuffer.from_defaults(token_limit=1500) with a custom interaction?

11 comments

LLogan M

What do you mean by custom interaction? Like adding a message to the memory?

eelmegatan26

@Logan M Yes, I'm inserting a custom interaction along with the actual chat messages. I use this format with 'react' and it works, but fails with 'context'

Plain Text

for element in incoming_chat_history:
        custom_chat_history.append(ChatMessage(role=MessageRole.USER, content=element[0]))
        custom_chat_history.append(ChatMessage(role=MessageRole.ASSISTANT, content=element[1]))

eelmegatan26

Example:

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chat_engine = index.as_chat_engine(
                    chat_mode="context",
                    memory=custom_chat_history,
                    system_prompt="Please only answer questions relevant to the context.",
    )

LLogan M

aha!

LLogan M

True this instead

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chat_engine = index.as_chat_engine(
              chat_mode="context",
              chat_history=custom_chat_history,
              system_prompt="Please only answer questions relevant to the context.",
    )

eelmegatan26

ahh...

eelmegatan26

Got it! One last question on a related note 😉 Are there any custom {variables} I should use in the system_prompt to instruct the AI to only answers questions from data retrieved from the index? I was using "context" but didn't see if there was a specific reference like there is with custom prompts?

eelmegatan26

And once again THANK YOU

LLogan M

Yea not really any custom variables i can think of. If you know the content of the underlying index ahead of time, you can set the system prompt to be more specific

i.e.

You are a chatbot with access to extra context information about X. Only answer questions if you can find the answer in the context, otherwise, kindly inform the user that you cannot find the answer."

LLogan M

I wrote that on the spot, but it sounds like it should work haha

eelmegatan26

Yep that should do it

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