On Aug 21, 2011 1:34 PM, "Max" wrote:
> > a[0:11][::-1]
> > # Instead of a[10:-1:-1], which looks like it should work, but doesn't.
>
> It works nicely, but it is 1.3 times slower in my code (I am surprised
> the interpreter doesn't optimize this).
Have you tried reverse()? I haven't timed it, bu
On Sun, Aug 21, 2011 at 10:27 AM, Max wrote:
> On Aug 20, 1:40 pm, Steven D'Aprano +comp.lang.pyt...@pearwood.info> wrote:
>> On Sat, Aug 20, 2011 at 7:20 PM, Max Moroz wrote:
>> > Would it be a good idea to change Python definition so that a[10, -1, -1]
>>
>> I presume you mean slice notation a
On Aug 20, 1:40 pm, Steven D'Aprano wrote:
> Pardon me for breaking threading, but I don't have Max's original post.
Not sure why; I also can't see it! I'll copy it at the end just in
case.
> On Sat, Aug 20, 2011 at 7:20 PM, Max Moroz wrote:
> > Would it be a good idea to change Python definiti
Pardon me for breaking threading, but I don't have Max's original post.
On Sat, Aug 20, 2011 at 7:20 PM, Max Moroz wrote:
> Would it be a good idea to change Python definition so that a[10, -1, -1]
I presume you mean slice notation a[10:-1:-1].
> referred to the elements starting with positio
On Sat, Aug 20, 2011 at 7:52 PM, Max wrote:
> That doesn't work if it's set in a loop or if it's calculated as a
> formula. For example, this very simple code doesn't work because of
> the "-1 problem".
>
Right, which is what I meant by setting it to an explicit None:
if input[starting_pos:endin
On Aug 20, 11:29 am, Chris Angelico wrote:
> If you're using a variable for the stop value, you just need to set it
> to an explicit None if it would fall negative:
>
> >>> a[10:None:-1]
>
That doesn't work if it's set in a loop or if it's calculated as a
formula. For example, this very simple co
On Sat, Aug 20, 2011 at 7:20 PM, Max Moroz wrote:
> Would it be a good idea to change Python definition so that a[10, -1, -1]
> referred to the elements starting with position 10, going down to the
> beginning?
Well, first off I think it's a dangerous idea to change semantics of
something like th
Would it be a good idea to change Python definition so that a[10, -1, -1]
referred to the elements starting with position 10, going down to the
beginning?
This would require disabling the "negative stop value means counting from
the end of the array" magic whenever the step value is negative.
The
