Generators and Iterators — Video Resources

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Best Single Video

Python Tutorial: Generators - How to Use Them and the Benefits You Receive by Corey Schafer (~11 min) Why: Builds generators from the ground up, starting with a normal function and converting it to a generator with yield. Demonstrates memory savings with concrete before-and-after measurements. Clear, concise, and immediately practical. The go-to starting point for understanding generators.

Alternatives

• Generators by Socratica (~9 min) — A polished, classroom-style explanation of generators with a focus on the conceptual "why." Socratica's production quality makes this feel like a lecture, which some learners prefer.
• Iterators, Iterables, and Itertools by Socratica (~12 min) — Covers the iterator protocol (iter and next), what makes something iterable versus an iterator, and introduces the itertools module. A different angle that focuses on the protocol underneath generators.

Deep Dives

• Python Tutorial: Decorators - Dynamically Alter The Functionality Of Your Functions by Corey Schafer (30 min) — Understanding closures (covered in the first half) is essential for grasping how generators maintain state between yields. This video fills in the mental model that makes generators click.

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Last verified: February 2026