Llama Packs Example#

Open In Colab

This example shows you how to use a simple Llama Pack with VoyageAI. We show the following:

  • How to download a Llama Pack

  • How to inspect its modules

  • How to run it out of the box

  • How to customize it.

You can find all packs on https://llamahub.ai

Setup Data#

!wget "https://www.dropbox.com/s/f6bmb19xdg0xedm/paul_graham_essay.txt?dl=1" -O paul_graham_essay.txt
from llama_index.core import SimpleDirectoryReader

# load in some sample data
reader = SimpleDirectoryReader(input_files=["paul_graham_essay.txt"])
documents = reader.load_data()

Download and Initialize Pack#

We use download_llama_pack to download the pack class, and then we initialize it with documents.

Every pack will have different initialization parameters. You can find more about the initialization parameters for each pack through its README (also on LlamaHub).

NOTE: You must also specify an output directory. In this case the pack is downloaded to voyage_pack. This allows you to customize and make changes to the file, and import it later!

from llama_index.core.llama_pack import download_llama_pack

VoyageQueryEnginePack = download_llama_pack(
    "VoyageQueryEnginePack", "./voyage_pack"
voyage_pack = VoyageQueryEnginePack(documents)

Inspect Modules#

modules = voyage_pack.get_modules()
{'llm': OpenAI(callback_manager=<llama_index.callbacks.base.CallbackManager object at 0x11fdaae90>, model='gpt-4', temperature=0.1, max_tokens=None, additional_kwargs={}, max_retries=3, timeout=60.0, api_key='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', api_base='https://api.openai.com/v1', api_version=''),
 'index': <llama_index.indices.vector_store.base.VectorStoreIndex at 0x2bccb3b50>}
llm = modules["llm"]
vector_index = modules["index"]
# try out LLM
response = llm.complete("hello world")
# try out retriever
retriever = vector_index.as_retriever()
results = retriever.retrieve("What did the author do growing up?")

Run Pack#

Every pack has a run function that will accomplish a certain task out of the box. Here we will go through the full RAG pipeline with VoyageAI embeddings.

# this will run the full pack
response = voyage_pack.run(
    "What did the author do growing up?", similarity_top_k=2
The author spent his time outside of school mainly writing and programming. He wrote short stories and attempted to write programs on an IBM 1401. Later, he started programming on a TRS-80, creating simple games and a word processor. He also painted still lives while studying at the Accademia.

Try Customizing Pack#

A major feature of LlamaPacks is that you can and should inspect and modify the code templates!

In this example we’ll show how to customize the template with a different LLM, while keeping Voyage embeddings, and then re-use it. We’ll use Anthropic instead.

Let’s go into voyage_pack and create a copy.

  1. For demo purposes we’ll copy voyage_pack into voyage_pack_copy.

  2. Go into voyage_pack_copy/base.py and look at the VoyageQueryEnginePack class definition. This is where all the core logic lives. As you can see the pack class itself is a very light base abstraction. You’re free to copy/paste the code as you wish.

  3. Go into the line in the __init__ where it do llm = OpenAI(model="gpt-4") and instead change it to llm = Anthropic() (which defaults to claude-2).

  4. Do from llama_index.llms import Anthropic and ensure that ANTHROPIC_API_KEY is set in your env variable.

  5. Now you can use!

In the below sections we’ll directly re-import the modified VoyageQueryEnginePack and use it.

from voyage_pack_copy.base import VoyageQueryEnginePack

voyage_pack = VoyageQueryEnginePack(documents)
response = voyage_pack.run("What did the author do during his time in RISD?")
 Unfortunately I do not have enough context in the provided information to definitively state what the author did during his time at RISD. The passage mentions that he learned a lot in a color class he took there, that he was basically teaching himself to paint, and that in 1993 he dropped out. But there are no specific details provided about his activities or course of study during his time enrolled at RISD. I apologize that I cannot provide a more complete response.