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Einfüehrung in Python
book

Einfüehrung in Python

by Mark Lutz, David Ascher
August 2007
Beginner to intermediate
656 pages
17h 20m
German
O'Reilly Verlag
Content preview from Einfüehrung in Python

Klassen als Datensätze

In Chapter 6 haben Sie gesehen, wie man Dictionaries benutzt, um Eigenschaften von Elementen in Ihrem Programm zu speichern. Darauf möchten wir nun genauer eingehen. Hier ein Beispiel für weiter oben benutzte Datensätze auf Basis von Dictionaries:

>>> rec = {  }
>>> rec['name'] = 'mel'
>>> rec['age']  = 40
>>> rec['job']  = 'trainer/writer'
>>>
>>> print rec['name']
mel

Dieser Code emuliert Dinge, die in anderen Sprachen als »Records« und »Structs« bezeichnet werden. Wie sich herausstellt, gibt es mehrere Möglichkeiten, das Gleiche mit Klassen zu machen. Die einfachste ist vielleicht folgende:

>>> class rec: pass
...
>>> rec.name = 'mel'
>>> rec.age  = 40
>>> rec.job  = 'trainer/writer'
>>>
>>> print rec.age
40

Dieser Code benutzt ...

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Publisher Resources

ISBN: 9783897214880