Coding an AutoAI RAG experiment with a Chroma vector store

Grounding documents

Prepare and connect to the grounding documents you will use to run the RAG experiment. For details, see Getting and preparing data in a project.

• Supported formats: PDF, HTML, DOCX, Markdown, plain text
• Connect to data in a Cloud Object Storage bucket, a folder in a bucket, or specify up to 20 files.
• AutoAI uses sample of documents for running the experiment

For example, to create a data connection when documents are stored in a Cloud Object Storage bucket:

from ibm_watsonx_ai.helpers import DataConnection, S3Location

conn_meta_props= {
    client.connections.ConfigurationMetaNames.NAME: f"Connection to input data - {datasource_name} ",
    client.connections.ConfigurationMetaNames.DATASOURCE_TYPE: client.connections.get_datasource_type_id_by_name(datasource_name),
    client.connections.ConfigurationMetaNames.DESCRIPTION: "ibm-watsonx-ai SDK documentation",
    client.connections.ConfigurationMetaNames.PROPERTIES: {
        'bucket': <BUCKET_NAME>,
        'access_key': <ACCESS_KEY>,
        'secret_key': <SECRET_ACCESS_KEY>,
        'iam_url': 'https://iam.cloud.ibm.com/identity/token',
        'url': <ENDPOINT_URL>
    }
}

conn_details = client.connections.create(meta_props=conn_meta_props)
cos_connection_id = client.connections.get_id(conn_details)

input_data_references = [DataConnection(
    connection_asset_id=cos_connection_id,
    location=S3Location(
        bucket=<BACKET_NAME>,
        path=<BACKET_PATH>
    )
)]

The following example shows how to use the data asset created in the project (or promoted to the space).

import os, wget
from ibm_watsonx_ai.helpers import DataConnection

input_data_filename = "core_api.html"
input_data_path = f"https://ibm.github.io/watsonx-ai-python-sdk/{input_data_filename}"

if not os.path.isfile(input_data_filename): 
    wget.download(input_data_path, out=input_data_filename)
    
asset_details = client.data_assets.create(input_data_filename, input_data_filename)
asset_id = client.data_assets.get_id(asset_details)
asset_id

input_data_references = [DataConnection(data_asset_id=asset_id)]

Evaluation data

• Evaluation data must be in JSON format with a fixed schema with these fields: question, correct_answer, correct_answer_document_ids

For example:

[
    {
        "question": "What is the purpose of get_token()?",
        "correct_answer": "get_token() is used to retrieve an authentication token for secure API access.",
        "correct_answer_document_ids": [
            "core_api.html"
        ]
    },
    {
        "question": "How does the delete_model() function operate?",
        "correct_answer": "delete_model() method allows users to delete models they've created or managed.",
        "correct_answer_document_ids": [
            "core_api.html"
        ]
    }
]

To prepare the evaluation data:

import os, wget
from ibm_watsonx_ai.helpers import DataConnection

test_data_filename = "benchmarking_data_core_api.json"
test_data_path = f"https://github.com/IBM/watsonx-ai-samples/blob/master/cloud/data/autoai_rag/{test_data_filename}"

if not os.path.isfile(test_data_filename): 
    wget.download(test_data_path, out=test_data_filename)

test_asset_details = client.data_assets.create(name=test_data_filename, file_path=test_data_filename)
test_asset_id = client.data_assets.get_id(test_asset_details)

test_data_references = [DataConnection(data_asset_id=test_asset_id)]

Select a pattern to test locally

The next step is select a pattern and test it locally. Because Chroma is in-memory, you must recreate the document index.

from langchain_community.document_loaders import WebBaseLoader

best_pattern = rag_optimizer.get_pattern()

urls = [
    "https://ibm.github.io/watsonx-ai-python-sdk/core_api.html",
    "https://ibm.github.io/watsonx-ai-python-sdk/fm_embeddings.html",
]
docs_list = WebBaseLoader(urls).load()
doc_splits = best_pattern.chunker.split_documents(docs_list)
best_pattern.indexing_function(doc_splits)

Query the RAG pattern locally.

payload = {
    client.deployments.ScoringMetaNames.INPUT_DATA: [
        {
            "values": ["How to use new approach of providing credentials to APIClient?"],
        }
    ]
}

best_pattern.query(payload)

The model's response looks like this:

According to the document, the new approach to provide credentials to APIClient is by using the Credentials class. Here's an example:


from ibm_watsonx_ai import APIClient
from ibm_watsonx_ai import Credentials

credentials = Credentials(
                   url = "https://us-south.ml.cloud.ibm.com",
                   token = "***********",
                  )

client = APIClient(credentials)


This replaces the old approach of passing a dictionary with credentials to the APIClient constructor.

Get inference and indexing notebook

To download a specified inference notebook, use the get_inference_notebook(). If you leave pattern_name empty, the method downloads the notebook of the best computed pattern.

rag_optimizer.get_inference_notebook(pattern_name='Pattern3')

Parent topic: Automating a RAG pattern with the AutoAI SDK