51. What Is Natural Language Processing (NLP)
51.5 Practice, Tip and Close
Why. Lock the idea: NLP = text → clean → numbers → model, before you code TF-IDF.
How.
Chapter practice
- Write three fictional Mauli WhatsApp lines (mix English); clean one with the regex pattern from 51.3.
- List two app tasks that need classical NLP vs one that needs an LLM.
- Explain bag-of-words in one sentence to a non-coder friend.
Thodkyaat sangaycha tar (quick recap)
- NLP helps computers read shop/app language
- Classical NLP ≠ ChatGPT (different lane)
- Clean → tokens → matrix → classifier
- Next: TF-IDF vectors in sklearn
Samajla ka? Next: Chapter 52 — Text Cleaning and TF-IDF in Python.