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Johann Hibschman
johann at physics.berkeley.edu
Tue Apr 18 13:00:51 EDT 2000
Daley, MarkX writes:
> This feels like a real newbie question, but here is the code that is causing
> my question:
> # Learning exceptions
> def test():
> a = [-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5]
> print a
> b = 5
> for item in a:
> try:
> print b / a[item]
> except ZeroDivisionError:
> pass
No, it's iterating in order.
On the first step,
item = -5, a[item] = 1, and 5/1 = 1
then item = -4, a[item] = 2, and 5/2 = 2
then item = -3, a[item] = 3, and 5/3 = 1
I'm guessing that you either:
1. Really want "b/item" not "b/a[item]"
or
2. Don't understand negative indexing. A negative index to a list
counts from the back of the list front.
--
Johann Hibschman johann at physics.berkeley.edu
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