RAG_Techniques/all_rag_techniques/simple_csv_rag_with_llamaindex.ipynb

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    "# Simple RAG (Retrieval-Augmented Generation) System for CSV Files\n",
    "\n",
    "## Overview\n",
    "\n",
    "This code implements a basic Retrieval-Augmented Generation (RAG) system for processing and querying CSV documents. The system encodes the document content into a vector store, which can then be queried to retrieve relevant information.\n",
    "\n",
    "# CSV File Structure and Use Case\n",
    "The CSV file contains dummy customer data, comprising various attributes like first name, last name, company, etc. This dataset will be utilized for a RAG use case, facilitating the creation of a customer information Q&A system.\n",
    "\n",
    "## Key Components\n",
    "\n",
    "1. Loading and spliting csv files.\n",
    "2. Vector store creation using [FAISS](https://engineering.fb.com/2017/03/29/data-infrastructure/faiss-a-library-for-efficient-similarity-search/) and OpenAI embeddings\n",
    "3. Query engine setup for querying the processed documents\n",
    "4. Creating a question and answer over the csv data.\n",
    "\n",
    "## Method Details\n",
    "\n",
    "### Document Preprocessing\n",
    "\n",
    "1. The csv is loaded using LlamaIndex's [PagedCSVReader](https://docs.llamaindex.ai/en/stable/api_reference/readers/file/#llama_index.readers.file.PagedCSVReader)\n",
    "2. This reader converts each row into a LlamaIndex Document along with the respective column names of the table. No further splitting applied.\n",
    "\n",
    "\n",
    "### Vector Store Creation\n",
    "\n",
    "1. OpenAI embeddings are used to create vector representations of the text chunks.\n",
    "2. A FAISS vector store is created from these embeddings for efficient similarity search.\n",
    "\n",
    "### Query Engine Setup\n",
    "\n",
    "1. A query engine is configured to fetch the most relevant chunks for a given query then answer the question.\n",
    "\n",
    "## Benefits of this Approach\n",
    "\n",
    "1. Scalability: Can handle large documents by processing them in chunks.\n",
    "2. Flexibility: Easy to adjust parameters like chunk size and number of retrieved results.\n",
    "3. Efficiency: Utilizes FAISS for fast similarity search in high-dimensional spaces.\n",
    "4. Integration with Advanced NLP: Uses OpenAI embeddings for state-of-the-art text representation.\n",
    "\n",
    "## Conclusion\n",
    "\n",
    "This simple RAG system provides a solid foundation for building more complex information retrieval and question-answering systems. By encoding document content into a searchable vector store, it enables efficient retrieval of relevant information in response to queries. This approach is particularly useful for applications requiring quick access to specific information within a CSV file."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Imports & Environment Variables "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "from llama_index.core.readers import SimpleDirectoryReader\n",
    "from llama_index.core import Settings\n",
    "from llama_index.llms.openai import OpenAI\n",
    "from llama_index.embeddings.openai import OpenAIEmbedding\n",
    "from llama_index.readers.file import PagedCSVReader\n",
    "from llama_index.vector_stores.faiss import FaissVectorStore\n",
    "from llama_index.core.ingestion import IngestionPipeline\n",
    "from llama_index.core import VectorStoreIndex\n",
    "import faiss\n",
    "import os\n",
    "import pandas as pd\n",
    "from dotenv import load_dotenv\n",
    "\n",
    "\n",
    "# Load environment variables from a .env file\n",
    "load_dotenv()\n",
    "\n",
    "# Set the OpenAI API key environment variable\n",
    "os.environ[\"OPENAI_API_KEY\"] = os.getenv('OPENAI_API_KEY')\n",
    "\n",
    "\n",
    "# Llamaindex global settings for llm and embeddings\n",
    "EMBED_DIMENSION=512\n",
    "Settings.llm = OpenAI(model=\"gpt-3.5-turbo\")\n",
    "Settings.embed_model = OpenAIEmbedding(model=\"text-embedding-3-small\", dimensions=EMBED_DIMENSION)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### CSV File Structure and Use Case\n",
    "The CSV file contains dummy customer data, comprising various attributes like first name, last name, company, etc. This dataset will be utilized for a RAG use case, facilitating the creation of a customer information Q&A system."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "file_path = ('../data/customers-100.csv') # insert the path of the csv file\n",
    "data = pd.read_csv(file_path)\n",
    "\n",
    "# Preview the csv file\n",
    "data.head()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Vector Store"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Create FaisVectorStore to store embeddings\n",
    "fais_index = faiss.IndexFlatL2(EMBED_DIMENSION)\n",
    "vector_store = FaissVectorStore(faiss_index=fais_index)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Load and Process CSV Data as Document"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "csv_reader = PagedCSVReader()\n",
    "\n",
    "reader = SimpleDirectoryReader( \n",
    "    input_files=[file_path],\n",
    "    file_extractor= {\".csv\": csv_reader}\n",
    "    )\n",
    "\n",
    "docs = reader.load_data()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Index: 1\n",
      "Customer Id: DD37Cf93aecA6Dc\n",
      "First Name: Sheryl\n",
      "Last Name: Baxter\n",
      "Company: Rasmussen Group\n",
      "City: East Leonard\n",
      "Country: Chile\n",
      "Phone 1: 229.077.5154\n",
      "Phone 2: 397.884.0519x718\n",
      "Email: zunigavanessa@smith.info\n",
      "Subscription Date: 2020-08-24\n",
      "Website: http://www.stephenson.com/\n"
     ]
    }
   ],
   "source": [
    "# Check a sample chunk\n",
    "print(docs[0].text)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Ingestion Pipeline"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "pipeline = IngestionPipeline(\n",
    "    vector_store=vector_store,\n",
    "    documents=docs\n",
    ")\n",
    "\n",
    "nodes = pipeline.run()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Create Query Engine"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "vector_store_index = VectorStoreIndex(nodes)\n",
    "query_engine = vector_store_index.as_query_engine(similarity_top_k=2)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Query the rag bot with a question based on the CSV data"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Rasmussen Group'"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "response = query_engine.query(\"which company does sheryl Baxter work for?\")\n",
    "response.response"
   ]
  }
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