On Jan 20, 2008, at 11:13 PM, William Stein wrote:
> On Jan 20, 2008 2:58 PM, Nick Alexander <[EMAIL PROTECTED]> wrote:
>>
>>
>> On 20-Jan-08, at 2:47 PM, Simon King wrote:
>>
>>>
>>> Dear Nick
>>>
>>> On Jan 20, 8:24 pm, Nick Alexander <[EMAIL PROTECTED]> wrote:
>>>> I've always hated that x/y and print x/y can do different things at
>>>> the prompt, but it sounds like I'm fighting a losing battle.
>>>
>>> Sorry for coming into your discussion. I actually appreciate that
>>> x/y
>>> and print x/y do different things, for the following reason.
>>>
>>> If someone defines some sage object X and just types
>>> sage: X
>>> then the command is very short, and when i ask a short question, the
>>> answer ought to be short as well.
>>>
>>> On the other hand, if the user's demand on displaying X is more
>>> elaborate, such as
>>> sage: print X
>>> then the displayed information should be more elaborate as well.
>>
>> One reason that I don't like this is that in the notebook, only the
>> final 'sage: X' shows that way. Before that, one must use print.
>> Why the different semantics?
>>
>
> Currently in the notebook we have this behavior:
>
> {{{id=14|
> a = 5
> a
> 2 + 2
> ///
> 4
> }}}
>
> Nick asks why this doesn't happen:
>
> {{{id=14|
> a = 5
> a
> 2 + 2
> ///
> 5
> 4
> }}}
>
> The answer is --- I couldn't figure out how to implement the latter
> (in sage/server/notebook/worksheet.py).
> That's it. I just don't know how to do it. It's nothing more
> mysterious than that. If I could figure
> out how to implement the latter I would.
I'd imagine one would do it the same was as doctests, (almost) always
assigning to a variable and then spitting out the string if it is not
None... This doesn't solve the issue printing things from within a
function (and detecting that would require more complicated parsing
too).
- Robert
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