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 9. Metaprogramowanie
Jednym z najważniejszych haseł w dziedzinie rozwijania oprogramowania jest „nie powtarzaj się”. Oznacza to, że gdy musisz napisać wysoce powtarzalny kod (lub wycinać i wklejać kod źródłowy), często warto poszukać bardziej eleganckiego rozwiązania. W Pythonie tego rodzaju problemy często rozwiązuje się za pomocą metaprogramowania. Podejście to polega na tworzeniu funkcji i klas, których głównym zadaniem jest manipulowanie kodem (modyfikowanie i generowanie istniejącego kodu oraz tworzenie nakładek na niego). Głównymi mechanizmami są tu dekoratory, dekoratory klas i metaklasy, jednak metaprogramowanie związane jest też z wieloma innymi przydatnymi zagadnieniami — obiektami sygnatur, wykonywaniem kodu za pomocą wywołania ...
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