#18940: Polynomials ignore the step argument in __getitem__
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Reporter: pbruin | Owner:
Type: defect | Status: needs_info
Priority: major | Milestone: sage-6.10
Component: algebra | Resolution:
Keywords: | Merged in:
Authors: Peter Bruin | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/pbruin/18940-getitem_step | 1c56779b3140d12fbe5d0973cdcad0ac9dbb8054
Dependencies: #19409 | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:22 tscrim]:
> I personally would find that the degree was lowered more surprising
So what's in your opinion the correct answer for
{{{
sage: pol = PolynomialRing(QQ, 'x')(range(10))
sage: list(pol[2::2])
}}}
If we cannot agree on a "natural" definition for `pol[a:b:c]`, perhaps the
best compromise is simply
{{{
if isinstance(i, slice):
raise NotImplementedError("polynomial slicing is not defined")
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18940#comment:23>
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