lists and for loops
Tim Chase
python.list at tim.thechases.com
Thu Aug 18 14:45:10 CEST 2011
On 08/18/2011 07:22 AM, Mark Niemczyk wrote:
> Or, using list comprehension.
>
>>>> numbers = [1, 2, 3, 4, 5]
>>>> numbers = [n + 5 for n in numbers]
>>>> numbers
> [6, 7, 8, 9, 10]
Or, if you want it in-place:
numbers[:] = [n+5 for n in numbers]
which makes a difference if you have another reference to numbers:
>>> numbers = [1,2,3,4,5]
>>> digits = numbers
>>> numbers = [n+5 for n in numbers]
>>> numbers, digits
([6, 7, 8, 9, 10], [1, 2, 3, 4, 5])
>>> numbers = [1,2,3,4,5]
>>> digits = numbers
>>> numbers[:] = [n+5 for n in numbers]
>>> numbers, digits
([6, 7, 8, 9, 10], [6, 7, 8, 9, 10])
-tkc
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