#19628: lazy_import breaks CachedRepresentation
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Reporter: cheuberg | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.10
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:21 vbraun]:
> Both "it" refer to "import of any object for which 'is'-comparison
matters". As opposed to factory functions.
Now the question becomes: to what extent does equality matter? One of my
proposals is to fix lazy imports in cached functions. That would seriously
reduce the extent to which equality matters. It would certainly fix this:
{{{
sage: from sage.misc.lazy_import import LazyImport
sage: lazyZZ = LazyImport('sage.rings.integer_ring', 'ZZ')
sage: PolynomialRing(lazyZZ, 'x') is PolynomialRing(ZZ, 'x')
False
}}}
What do you think about this?
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Ticket URL: <http://trac.sagemath.org/ticket/19628#comment:23>
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