September 2009
Intermediate to advanced
464 pages
17h 19m
German
Content preview from Python für Kids
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290
Objekte und Methoden
Kapitel
11
Oft ist es sehr nützlich, dass Python auch negative Indizes versteht:
>>> stringB
'bad'
>>> stringB[-1]
'd'
>>> stringB[-2]
'a'
>>> listeC
[1, [2, 3], [4, [5, 6]]]
>>> listeC[-3]
1
Negative Indizes bedeuten also, dass die Elemente einer Sequenz vom letz-
ten, das den Index -1 hat, weg nach vorn gezählt werden. Denke so: Wenn
du bei der hinteren schließenden Klammer der Liste stehst – wie viele
Schritte musst du zurückgehen, um zum Element zu kommen?
Erzeugen von Sequenzen mit den Operatio-
nen + und *
Neben dem direkten Anschreiben gibt es noch andere Arten, Sequenzen zu
erzeugen. Eine Art, die für alle Sequenzen ...
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