On Sat, Jan 30, 2010 at 10:23 PM, Dima Pasechnik <dimp...@gmail.com> wrote:
> On Jan 30, 1:35 pm, John H Palmieri <jhpalmier...@gmail.com> wrote:
>> On Jan 29, 8:46 pm, Dima Pasechnik <dimp...@gmail.com> wrote:
>>
>> > it shows, by the way, that idea to use set() (or Set()) to remedy
>> > differences in docstrings with
>> > the output of randomised procedures, discussed
>> > here:http://groups.google.com/group/sage-devel/browse_thread/thread/1f688f...
>> > does not really fly.
>>
>> How does it show this? If your expected output is a list [x,y] or
>> [y,x], but you can't tell which, then
>>
>> sage: set(OUTPUT) == set([x,y])
>> True
>> sage: x in OUTPUT
>> True
>> sage: y in OUTPUT
>> True
>> sage: len(OUTPUT)
>> 2
>>
>> I see that you can't do
>>
>> sage: OUTPUT
>> set([x,y])
>>
>> but why not the other options? I feel like I'm missing something...
>>
>
> one cannot write things like set([x,y]) in EXAMPLES::
> it needs to be explicitly expanded.
EXAMPLES::
This will always work, but is not desirable, since output is not checked::
sage: set([x,y]) # randoma
This always works:
sage: v = set([x,y])
sage: sorted(list(v))
[x, y]
> Further, imagine you only know that the function must output
> p*a*q, for
> a=[[1,...,5],
> [6,...10],
> [11,...,15]]
>
> and p and q unknown permutation matrices of appropriate sizes.
> So you need to chase 5!.3!=720 cases, and take the right one.
> This is easy to do, but to write out the set of 720 matrices in the
> EXAMPLES::
> explicitly makes little sense.
> That's what TESTS:: is for, AFAIK.
Please do not put 720 matrices anywhere in the Sage docstrings. Ick.
William
>
> Dmitrii
>
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--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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