On 11/22/2013 09:34 PM, John Cremona wrote:
On 22 November 2013 13:31, Nathann Cohen <nathann.co...@gmail.com> wrote:
Hellooooooo !!
Backwards compatibility issues?
Well, we can deprecate stuff for a start. And the message could say "What
you are looking for moved to a different place ! It's larger, there is a lot
of light and a comfy couch. Come join us !"
I have a lot of code where I would
not want to change every NumberField(...) to fields.NumberField(...)
and similarly with QuadraticField() and CyclotomicField(). Is this
just a question of scale, i.e. those are almost all the special field
constructors while there are lots and lots of codes?
Hmmm... There is no "fields.<tab>" object in the version of Sage I run, so I
don't get your question O_o
You are right -- but I thought that your proposal was that there
should be, instead of what there is now.
My reason for suggesting this change (at least for the sage/coding) is
so that the codes are more easily discoverable.
Right now, if I want a specific code, say Hamming code, I have to
remember "oh.. the name of the code is Hamming, so it probably starts
with Hamming in Sage too. Oh great! That works! Hamming<tab> gives
HammingCode. Let's try LDPC<tab>.. nothing, ok.. maybe.. ldp<tab>, nope.
Low<tab>, nope." And then I will have to go around searching through the
documentation and realize that ldpc codes are not there in Sage.
With the codes.<code> introduced by Nathann, it can easily be checked
what codes are there - by simply doing a codes.<tab>. Once this ticket
is in place, it would be in fact nice to not have all these codes also
in the global namespace. Having them in both places is a duplication,
and might even be confusing to a new user. It is not for now, but rather
for later - as the components inside Sage themselves grow in size with
new constructions they will be better organized if they are under the
general names and discoverable via tab completion beyond that.
Temporarily, one's programs may not run or may give deprecation errors.
Over the long term everyone should benefit from a neatly organized
namespace.
Just my opinion. :)
- basu.
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