module trace and counts

Dave Angel d at davea.name
Sun Nov 18 03:54:31 CET 2012


On 11/17/2012 08:30 PM, Steven D'Aprano wrote:
> On Sat, 17 Nov 2012 13:37:23 -0500, Dave Angel wrote:
>
>> On 11/17/2012 12:25 PM, rh wrote:
>>> Is it for or range that is executed 8000 times when I for i in
>>> range(3,8000,2):
>> Nothing is executed 8000 times.  I figure it at 3998 times.
> Off by one.
>
> py> len(range(3, 8000, 2))
> 3999
>
>
I should have actually let Python figure it.  Instead I knocked off one
because the interval is half-open, and another because it starts at 3. 
Then I checked it by subtracting the first from the last and dividing by
2  ( (7999-3)/2 ), but then made the stupid mistake of not adding one
because my interval WAS closed.



-- 

DaveA



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