RAG with Python: Hybrid Search, Reranking, and Rewriting — LearnFlat

RAG with Python: Hybrid Search, Reranking, and Rewriting

Learn to build modern Retrieval-Augmented Generation applications using LangChain, vector databases, and intelligent search techniques from the ground up.

⏱ 45 min 📚 3 lessons 🎧 Audio version

About this course

Large language models are powerful, but they often lack access to your specific data. Retrieval-Augmented Generation (RAG) bridges this gap, allowing you to connect AI to custom knowledge bases. In this text-based course, you will explore how to build robust RAG systems using Python. Starting with fundamental concepts, you will progress to implementing modern techniques like hybrid search, result reranking, and query rewriting to drastically improve the accuracy of AI responses. What you will learn: Understand the core architecture and terminology of Retrieval-Augmented Generation; Build foundational RAG pipelines using Python and LangChain; Implement vector databases to store and retrieve document embeddings; Apply hybrid search techniques combining keyword and semantic retrieval; Improve AI accuracy using result reranking and query rewriting patterns; Explore modern Agentic AI concepts for autonomous data retrieval. The course begins with clear definitions of AI terminology before moving into practical Python implementations. You will read through detailed explanations, examine code snippets, and practice building text-based AI retrieval systems step by step. This course is designed for beginners and aspiring developers; no prior experience with advanced machine learning is required. Start reading today to unlock the power of modern RAG and build smarter data-driven applications.

What you'll get

  • 📜 Certificate of completion
    Add it to your LinkedIn profile
  • 💬 Personal AI tutor
    Stuck on a lesson? Ask your built-in tutor anything, any time.
  • 🎧 Audio version included
    Learn on the go — no screen needed
  • ♾️ Lifetime access
    Come back anytime, no expiry
  • 📱 Phone or computer
    Works anywhere, any device
  • 💸 14-day refund
    No questions asked
  • Short & focused
    45 min of practical content

Reviews (1)

Александр Васильев BY
★ 4 · 2025-09-14T01:38:06+00:00

Давно искал внятное объяснение гибридного поиска, и здесь наконец сложилась картина: как совмещать плотные эмбеддинги с BM25 и зачем потом прогонять результаты через реранкер. Особенно зашёл блок про переписывание запроса перед обращением к векторной базе — раньше я недооценивал этот шаг, а он реально поднял качество выдачи в моём проекте на LangChain. Примеры рабочие, всё запускается без танцев с бубном. Единственное, по выбору самой векторной БД хотелось бы поглубже, но в целом курс закрыл почти все мои вопросы по RAG.

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Frequently asked

What do I need to take this course? +

Just a phone or computer with internet. No installs, no special hardware.

How do I pay? +

By card via Stripe. We don’t store card details — Stripe handles them securely.

Can I get a refund? +

Yes — full refund within 14 days, no questions asked.

How long will I have access? +

Forever. Once you purchase, the course is yours to revisit anytime.

Will I get a certificate? +

Yes. On completion you'll receive a certificate you can add to your LinkedIn profile.

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