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25 minAdvancedLesson 1/5

Iterators aur generators

Values lazily produce karo aur large streams process karo.

Project-ready extension
1 · Samjho

Idea, words aur real-world use pehle padho.

2 · Karke dekho

Example run karo, phir code task solve karo.

3 · Samjhaao

Quick check aur apne notes se concept explain karo.

Is lesson ke baad
  • Iterators and Generators ko apne words mein explain kar paana.
  • Working example ko run aur modify kar paana.
Yahin se start karo - pehle se kuch aana zaroori nahi

Kisi question ka answer dene se pehle hum samjhenge ki Iterators and Generators ka matlab kya hai, ye kahan useful hai aur example kaise behave karta hai. Naye words aate hi explain kiye gaye hain.

Idea ko samjho

Iterator __next__ se ek-ek value deta hai. Generator yield se same protocol kam boilerplate mein banata hai.

Real-world connection

Water tap request par next amount deta hai; poora tank table par store nahi karta.

Example ko step-by-step padho

  1. 1Program mein banaye gaye names aur values pehchaano.
  2. 2Har line ko top-to-bottom trace karo aur dekho wo kya change karti hai.
  3. 3Run Python dabane se pehle output predict karo, phir ek value change karo.

Kya yaad rakhna hai

  • Values lazily produce karo aur large streams process karo.
  • Mistake useful feedback hai: error ki last line padho, ek cheez change karo aur dobara run karo.
Interactive concept lab

Concept ko step-by-step dekho

Arrows use karke data ka safar samjho.

3D flow · 1/3
Raw input
records
01

Raw input

Clear input contract se shuru karo.

Runnable example

Iterators and Generators: working example

Example run karo, phir ek value change karke apni understanding test karo.

example.py
Python 3.14 · 5s limit
Quick check · 10 points

Generator values kaunsa keyword produce karta hai?

Advanced
Coding task · 20 points

Code ko complete karo

0 se 4 tak even values yield karo.

challenge.py
Python 3.14 · 5s limit

Key takeaways

  • Iterator __next__ se ek-ek value deta hai. Generator yield se same protocol kam boilerplate mein banata hai.
  • Is idea ko seekhne ka fastest way example ko change karke rerun karna hai.
Previous

Pass the quick check and coding task to complete this lesson.