takollama 0.2.2

RAG library

TakoLlama

A Python library for building Retrieval-Augmented Generation (RAG) systems with Ollama and ChromaDB. TakoLlama simplifies the process of extracting text from various sources, creating vector embeddings, and querying them with large language models.

Features

• Multi-format Text Extraction: Extract text from PDFs, HTML files, and web URLs
• Vector Database Management: Built-in ChromaDB integration for efficient similarity search
• Ollama Integration: Seamless integration with Ollama for embeddings and text generation
• Web Crawling: Intelligent web crawling with relevance filtering
• Flexible Data Processing: Configurable text chunking with overlap for better context preservation

Installation

pip install takollama

Prerequisites

• Python 3.12+
• Ollama installed and running
• Required models pulled in Ollama (e.g., ollama pull llama3.1, ollama pull mxbai-embed-large)

Quick Start

1. Basic RAG Pipeline

from takollama import RAG, VectorDB

# Initialize the RAG system
rag = RAG(
    chroma_db_dir="./my_db",
    chroma_db_name="my_collection",
    v_model="mxbai-embed-large"
)

# Load data from PDFs and HTML files
rag.vector_db.load_data(input_dir="./documents")

# Query the system
answer = rag.generate_answer("What is machine learning?", model="llama3.1")
print(answer)

2. Working with URLs

from takollama import VectorDB

# Initialize vector database
vdb = VectorDB("./web_db", "web_collection")

# Load data from URLs
vdb.load_data(urls_path="urls.txt")

# Query the database
results = vdb.query("How to install software?", k=5)
print(results)

3. Text Extraction Only

from takollama import TextExtractor

# Initialize text extractor
extractor = TextExtractor(
    input_dir="./documents",
    output_dir="./extracted_text",
    urls_file="urls.txt"
)

# Extract from PDFs
pdf_files = extractor.get_pdf()
for pdf in pdf_files:
    texts = extractor.extract_pdf_texts(pdf)
    print(f"Extracted {len(texts)} chunks from {pdf}")

# Extract from web URLs
urls = extractor.get_urls()
for url in urls:
    chunks = extractor.crawl_and_extract(url, max_depth=2)
    print(f"Extracted {len(chunks)} chunks from {url}")

Core Components

RAG Class

The main interface for retrieval-augmented generation:

• generate_answer(query, k=4, model="llama3.1"): Generate answers using retrieved context
• generate_prompt(question, context): Create prompts for the LLM

VectorDB Class

Manages the vector database operations:

• load_data(input_dir, output_dir, urls_path): Load data from various sources
• query(query_text, k=5): Search for similar documents
• show_sources(): List all data sources in the database
• delete_source(source): Remove documents from a specific source

TextExtractor Class

Handles text extraction from multiple formats:

• extract_pdf_texts(pdf_path): Extract text from PDF files
• extract_html_text(html_path): Extract text from HTML files
• crawl_and_extract(url, max_depth=1): Crawl websites and extract content

Configuration

Create a config.yaml file for your project:

vector_db:
  input_dir: "./data/documents/"
  output_dir: "./data/processed/"
  urls_path: "./data/urls.txt"
  chroma_db_dir: "./data/vector_db/"
  chroma_db_name: 'my_collection'
  model: "mxbai-embed-large"

ollama_model:
  model_name: "llama3.1"

Advanced Usage

Custom Text Chunking

# Extract with custom chunk size and overlap
extractor = TextExtractor("./docs", "./output")
chunks = extractor.extract_html_text(
    "document.html", 
    chars_per_file=1000, 
    overlap=200
)

Web Crawling with Depth Control

# Crawl website with custom parameters
chunks = extractor.crawl_and_extract(
    "https://example.com",
    chunk_size=800,
    overlap_size=100,
    max_depth=3
)

Database Management

# Check database status
vdb = VectorDB("./db", "collection")
print(f"Documents in database: {vdb.count_docs()}")
print(f"Available sources: {vdb.show_sources()}")

# Clear database
vdb.clear_database()

Supported Models

Embedding Models

• mxbai-embed-large (recommended)
• nomic-embed-text

Language Models

Any model supported by Ollama, like:

• gpt-oss:20b
• deepseek-r1:8b
• gemma3:12b
• llama3.1
• llama3.2:3b
• llama3.3:70b
• phi4:14b

Examples

The package includes various example scripts in takollama.scripts:

• RAG_query.py: Command-line RAG querying (available as takollama-query)
• extract_text.py: Text extraction utility (available as takollama-extract)
• create_rag_pipeline.py: Pipeline creation examples
• createDBlocal.py: Local database creation
• createDBColab.py: Colab-specific database setup

The notebooks/ directory contains Jupyter notebooks with detailed examples:

• DNALinux_RAG_UV.ipynb: Complete RAG workflow
• Various demonstration notebooks for different use cases

You can access these scripts after installation:

# Access script utilities programmatically
from takollama.scripts import RAG_query, extract_text

Command Line Tools

After installation, TakoLlama provides command-line tools for common tasks:

Query RAG Database

takollama-query \
  --e_model mxbai-embed-large \
  --LLM_model llama3.1 \
  --db_dir ./my_db \
  --db_name my_collection \
  --query "Your question here" \
  --k 4

Extract Text from Documents

# Extract from PDFs and HTML files
takollama-extract \
  --input_dir ./documents \
  --output_dir ./extracted_text \
  --process_pdfs \
  --process_html

# Extract from URLs
takollama-extract \
  --output_dir ./web_content \
  --urls_file urls.txt \
  --process_urls \
  --max_depth 2

# Extract from all sources
takollama-extract \
  --input_dir ./documents \
  --output_dir ./all_content \
  --urls_file urls.txt \
  --process_pdfs \
  --process_html \
  --process_urls \
  --chunk_size 800 \
  --overlap 150

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the GPL 3.0 as specified in the LICENSE file.

Requirements

• bs4>=0.0.2
• chromadb>=1.0.17
• langchain-community>=0.3.27
• ollama>=0.5.3
• pypdf>=6.0.0

Support

For issues and questions, please use the GitHub issue tracker.