Lecture 14: Simplified Attention Mechanism - Coded from scratch in Python | No trainable weights
In this lecture, we code a simplified attention mechanism from scratch, in Python. In the process, we learn about context vectors, attention scores and attention weights. We pay equal attention to theory, visual intuition and code.
The key reference book which this video series very closely follows is Build a Large Language Model from Scratch by Manning Publications. All schematics and their descriptions are borrowed from this incredible book!
This book serves as a comprehensive guide to understanding and building large language models, covering key concepts, techniques, and implementations.
Affiliate links for purchasing the book will be added soon. Stay tuned for updates!
0:00 Lecture objective
2:29 Context vectors
9:34 Coding embedding vectors in Python
14:45 What are attention scores?
19:18 Dot product and attention scores
22:57 Coding attention scores in Python
26:22 Simple normalisation
34:07 Softmax normalisation
37:34 Coding attention weights in Python
43:46 Context vector calculation visualised
50:19 Coding context vectors in Python
55:29 Coding attention score matrix for all queries
01:00:22 Coding attention weight matrix for all queries
01:04:27 Coding context vector matrix for all queries
01:14:10 Need for trainable weights in the attention mechanism
Link to code file: https://drive.google.com/file/d/1b5b2...
PyTorch Softmax Implementation: https://pytorch.org/docs/stable/gener...
=================================================
✉️ Join our FREE Newsletter: https://vizuara.ai/our-newsletter/
=================================================
Vizuara philosophy:
As we learn AI/ML/DL the material, we will share thoughts on what is actually useful in industry and what has become irrelevant. We will also share a lot of information on which subject contains open areas of research. Interested students can also start their research journey there.
Students who are confused or stuck in their ML journey, maybe courses and offline videos are not inspiring enough. What might inspire you is if you see someone else learning and implementing machine learning from scratch.
No cost. No hidden charges. Pure old school teaching and learning.
=================================================
🌟 Meet Our Team: 🌟
🎓 Dr. Raj Dandekar (MIT PhD, IIT Madras department topper)
🔗 LinkedIn: / raj-abhijit-dandekar-67a33118a
🎓 Dr. Rajat Dandekar (Purdue PhD, IIT Madras department gold medalist)
🔗 LinkedIn: / rajat-dandekar-901324b1
🎓 Dr. Sreedath Panat (MIT PhD, IIT Madras department gold medalist)
🔗 LinkedIn: / sreedath-panat-8a03b69a
🎓 Sahil Pocker (Machine Learning Engineer at Vizuara)
🔗 LinkedIn: / sahil-p-a7a30a8b
🎓 Abhijeet Singh (Software Developer at Vizuara, GSOC 24, SOB 23)
🔗 LinkedIn: / abhijeet-singh-9a1881192
🎓 Sourav Jana (Software Developer at Vizuara)
🔗 LinkedIn: / souravjana131