49. What Transformers Are (Text and Sequences)
49.5 Practice, Tip and Close
Why. Close when tokens, embeddings, and attention-as-focus are clear.
How.
Chapter practice
- Tokenise two fictional Mauli reviews by hand into ids.
- Run the Embedding snippet; print shape.
- Write three bullets: when TF-IDF, when tiny transformer-style net, when Gen AI APIs.
Thodkyaat sangaycha tar (quick recap)
- Transformers use attention over sequences
- Tokens → embeddings → blocks
- DS teaches the idea; Gen AI teaches LLM apps
- Classical NLP still matters for small text tables
Samajla ka? Next: Chapter 50 — Tiny text classifier intro in PyTorch.