#10963: More functorial constructions
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Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues:
public/ticket/10963 | Commit:
Dependencies: #11224, #8327, | eb7b486c6fecac296052f980788e15e2ad1b59e4
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394, #15150, #15506 |
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Comment (by SimonKing):
Replying to [comment:440 nthiery]:
> Replying to [comment:426 vbraun]:
> > I also think that the code on this ticket suffers from a lot of abuse
of lazy imports. They are a useful tool, but they don't absolve you from
thinking about import order of modules.
>
> Quite on the contrary, the code is being thoughtfully specific about
> import order. It's being explicit that, e.g., the Magmas category can
> be imported and is fully functional without importing
> Magmas.Associative (i.e. Semigroups). On the other hand, importing
> Semigroups really requires importing Magmas before hand.
+1 (see my reply to Volker in comment:428.
> > You are deliberately omitting the other half of the story: If you have
two unrelated classes `C` and `D` then `C.a` and `D.a` are unrelated in
Python. And you are breaking that.
>
> No, I am not!
Let's see if you give the same arguments that I gave in
comment:428... readingreadingreadin --- Yes, you do, so +1 `:-)`
> Ok, off for lunch!
Bon appetit !
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:441>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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