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Decorators and Function Craft: Python: Uncharted

Courses PythonDecorators and Function Craft

Decorators and Function Craft

Wrap call behavior with decorators, forward flexible arguments, preserve function identity, and combine functools and itertools into readable reusable tools.

Python
Unit 17 of 20
20 lessons
180 min
420 XP

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Lessons

20 total

1Gift-Wrapping FunctionsRecognize wrappers that add behavior around an operation while preserving its job.InteractiveConcept7 min20 XPOpen
2*args Takes Them AllCollect any number of positional amounts with *args and return their total.CodeConcept9 min20 XPOpen
3**kwargs Takes the NamesCollect named settings with **kwargs and format them in stable key order.CodeConcept8 min20 XPOpen
4Pass Them ThroughForward arbitrary positional and keyword arguments through a transparent wrapper.CodeConcept8 min20 XPOpen
5A Function Wrapping a FunctionBuild a manual wrapper that announces a call and preserves its returned value.CodeConcept9 min20 XPOpen
6The @ SignApply a wrapper with decorator syntax and preserve the wrapped function name.CodeConcept9 min20 XPOpen
7Predict the Wrapped CallPredict the print order created by a wrapper around one function call.InteractiveConcept8 min20 XPOpen
8Count the CallsBuild a stateful decorator that records an independent tally on each wrapped function.CodeConcept9 min20 XPOpen
9Check It FirstGuard a wrapped function by raising ValueError before invalid input reaches it.CodeConcept9 min20 XPOpen
10Decorators with ArgumentsBuild a two-layer @repeat(times) decorator that returns the final call result.CodeConcept9 min20 XPOpen
11Order of WrappingExpand two stacked decorators into the order Python applies and calls them.InteractiveConcept8 min20 XPOpen
12functools.partialPreset one keyword argument with functools.partial while leaving the rest callable.CodeConcept10 min20 XPOpen
13functools.lru_cacheMemoize recursive Fibonacci work with functools.lru_cache and measure the collapse.CodeConcept10 min20 XPOpen
14itertools: chain and countTake a finite preview from count and lazily combine two feeds with chain.CodeConcept9 min20 XPOpen
15Neighbors into GroupsGroup consecutive equal log entries with itertools.groupby.CodeConcept9 min20 XPOpen
16Build @once and @logCompose logging with a decorator that caches the first call result.CodePractice8 min20 XPOpen
17The Polite APICombine keyword-only defaults with reusable decorator validation.CodePractice10 min20 XPOpen
18Readable Beats CleverChoose a direct standard-library composition that communicates intent to teammates.InteractiveConcept10 min20 XPOpen
19Explain a DecoratorExplain what decorator syntax does to a function name and its later calls.InteractiveConcept9 min20 XPOpen
20Decorators Mastery CheckCombine a decorator factory, flexible forwarding, wraps, and partial in one API.CodeMastery check12 min40 XPOpen

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