September 2015
Intermediate to advanced
272 pages
6h 4m
German
Content preview from Effektiv Python programmieren - 59 Wege für bessere Python-Programme
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Kapitel 4: Metaklassen und Attribute
In Auflistungen von Pythons Features werden häufig Metaklassen aufgeführt, obwohl die wenigsten Leute wissen, was sie in der Praxis eigentlich bewerkstelligen. Die Bezeichnung Metaklasse deutet vage auf ein Konzept jenseits oder oberhalb einer Klasse hin. Einfach ausgedrückt ermöglichen Metaklassen bei der Definition einer Klasse das Unterbrechen von Pythons class-Anweisung, um ein spezielles Verhalten bereitzustellen.
Ähnlich rätselhaft und leistungsfähig sind auch Pythons Fähigkeiten, dynamisch den Zugriff auf Attribute zu steuern. Zusammen mit Pythons objektorientierten Konstrukten stellen diese Fähigkeiten hervorragende Werkzeuge bereit, um aus einfachen Klassen komplexe zu machen.
Allerdings ...
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