January 2014
Intermediate to advanced
600 pages
14h 51m
Polish
Content preview from Python. Receptury. Wydanie IIIBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Rozdział 4. Iteratory i generatory
Obsługa iterowania (czyli przechodzenia po elementach) to jedna z najmocniejszych stron Pythona. Na ogólnym poziomie iterowanie można traktować jak sposób na przetwarzanie elementów sekwencji. Jednak możliwości są o wiele większe. Można np. tworzyć własne obiekty iteratorów, stosować przydatne wzorce iterowania z modułu itertools, tworzyć funkcje generatorów itd. W tym rozdziale omówiono standardowe problemy związane z iterowaniem.
4.1. Ręczne korzystanie z iteratora
Problem
Programista zamierza przetwarzać elementy obiektu iterowalnego, ale z pewnych powodów nie może lub nie chce korzystać z pętli for.
Rozwiązanie
Aby ręcznie wykorzystać obiekt iterowalny, należy zastosować funkcję next() i napisać kod przechwytujący ...
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