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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

Chapter 25. Ausnahme-Objekte

Bislang waren wir absichtlich ziemlich vage bei dem Punkt, was eine Ausnahme tatsächlich ist. Python verallgemeinert den Begriff der Ausnahme. Es kann sich dabei entweder um String- oder Klassen-Objekte handeln. Beide haben ihre Vorteile, aber Klassen sind die bessere Lösung, wenn es um die Verwaltung von Ausnahme-Hierarchien geht.

Stringbasierte Ausnahmen

In allen bisher vorgestellten Beispielen bestanden benutzerdefinierte Ausnahmen aus Strings. Damit kann man eine Ausnahme einfacher codieren, denn jedes beliebige String-Objekt kann zur Identifikation einer Ausnahme verwendet werden:

>>> myexc = "Mein Ausnahme-String"
>>> try:
...     raise myexc
... except myexc:
...     print 'abgefangen'
...
abgefangen

Die Ausnahme wird durch ...

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Publisher Resources

ISBN: 9783897214880