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Closure Function - explain

Python/Codingeasy0.2 min readPremium
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Asked at 1 company
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LTIMindtree
Interview Pro Tip

Pro-Move: Default arg fix for loop closures. Red Flag: Unaware of late-binding gotcha.

Expert AnswerPremium
44 wordsInterview-ready
**Closure:** Function capturing enclosing scope. `def make_adder(n): return lambda x: x+n`. Inner 'closes over' n. **Use:** Callbacks, decorators, factories. **Gotcha:** Late binding in loops—`lambda x: x*i` captures i by reference; use `lambda x, i=i: x*i`. **Why:** DI, config....
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