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Iterators and Generators: Python: Uncharted

Courses PythonIterators and Generators

Iterators and Generators

Use the iterator protocol, yield values over time, consume lazy and infinite streams safely, reason about exhaustion, and compose generator pipelines that retain only the state they need.

Python
Unit 16 of 20
20 lessons
180 min
420 XP

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Lessons

20 total

1The Vending ConveyorChoose between an eager collection and a one-at-a-time stream for a concrete job.InteractiveConcept7 min20 XPOpen
2What for Really DoesReproduce a for loop by calling iter and next until StopIteration.CodeConcept9 min20 XPOpen
3next Until It StopsPredict values and exhaustion across repeated next calls on one iterator.InteractiveConcept8 min20 XPOpen
4Iterables vs IteratorsCreate independent iterators from one reusable list and observe one becoming exhausted.CodeConcept8 min20 XPOpen
5Your First yieldWrite count_up_to as a generator that yields each integer on demand.CodeConcept9 min20 XPOpen
6Paused, Not StoppedTrace exactly where a generator pauses at yield and resumes on the next request.CodeConcept9 min20 XPOpen
7Predict the YieldsPredict output order when prints surround yields and a generator is created before use.InteractiveConcept8 min20 XPOpen
8Endless Without DangerBuild an infinite counter and consume only a bounded number of values with next.CodeConcept9 min20 XPOpen
9Take What You NeedConsume at most n values from an iterator without exhausting work that was not requested.CodeConcept9 min20 XPOpen
10Generator ExpressionsSum even squares through a generator expression rather than an eager comprehension.CodeConcept9 min20 XPOpen
11Exhausted GeneratorsObserve that one generator is single-pass, then create a fresh generator for another pass.CodeConcept8 min20 XPOpen
12Fibonacci ForeverGenerate the Fibonacci sequence indefinitely while consumers take bounded prefixes.CodeConcept10 min20 XPOpen
13Pipelines of GeneratorsChain number, even-filter, and square stages without materializing intermediate lists.CodeConcept10 min20 XPOpen
14The Chore FeedYield due, unfinished chores from an automation schedule in stable order.CodeConcept9 min20 XPOpen
15Loop Tools, LiteAdvance enumerate and zip objects directly with next to reveal their lazy positions.CodeConcept9 min20 XPOpen
16yield vs returnPredict how yield changes a function shell and how return ends that generator.InteractiveConcept8 min20 XPOpen
17Paginate the FeedYield stable batches of size n from a stream, including one final partial batch.CodePractice10 min20 XPOpen
18Running Average StreamKeep total and count state between yields to stream each running average.CodePractice10 min20 XPOpen
19Lazy or Eager?Explain when a generator is a better tradeoff than a list and when it is not.InteractiveConcept9 min20 XPOpen
20Generators Mastery CheckCompose a lazy active-value, running-total, and stable-batch report pipeline.CodeMastery check12 min40 XPOpen

Errors and Robustness Decorators and Function Craft