#12482: isinstance failure on lazy imported class
-----------------------+----------------------------------------------------
Reporter: nthiery | Owner: jason
Type: defect | Status: new
Priority: major | Milestone: sage-5.0
Component: misc | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
-----------------------+----------------------------------------------------
isinstance may fail on a lazy imported class, which can cause hard to
track history-dependent failures (just been hit)::
{{{
sage: lazy_import('sage.rings.rational_field', 'RationalField')
sage: isinstance(QQ, RationalField)
False
sage: isinstance(QQ, RationalField)
True
}}}
Would there be a way to ensure that isinstance triggers the importing of
the class *before* its use?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12482>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
