June 2016
Intermediate to advanced
498 pages
10h 25m
German
Content preview from Python 3
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27Verarbeiten von Startparametern
Die Shell ist unter Linux die klassische Startumgebung für alle Programme. Typischerweise wird einem Programm beim Aufruf ein oder mehrere Parameter mitgegeben, zum Beispiel:
Die Anweisung an die Shell besteht aus dem eigentlichen Kommando, hier das Programm wc (Word Count), das die Wörter in einer Datei zählt, dem sogenannten Flag -l und dem zugehörigen Parameter/Argument.
Wie kommt ein Programm an die Daten aus der Kommandozeile? Python stellt die Kommandozeile eines Programms im Modul sys zur Verfügung. Wer möchte, kann die erhaltenen Daten „von Hand“ verarbeiten. Eine komfortable Möglichkeit bietet das Modul ...
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