#20094: Fix and clean up xsrange
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Reporter: dkrenn | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.1
Component: misc | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Description changed by jdemeyer:
Old description:
> We have
> {{{
> sage: next(xsrange(0, 2^63-2^10+2^9))
> ...
> OverflowError: Python int too large to convert to C long
> }}}
> This is because the internally used variable `count` is to large.
>
> FYI,
> {{{
> sage: next(xsrange(0, 2^63-2^10+2^9-1))
> 0
> }}}
> works
New description:
We have
{{{
sage: next(xsrange(0, 2^63-2^10+2^9))
...
OverflowError: Python int too large to convert to C long
}}}
This is because the internally used variable `count` is too large.
We solve this problem. While we're at it, we also move `xsrange()` and
related functions to a new Cython module `src/sage/arith/srange.pyx`.
--
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Ticket URL: <http://trac.sagemath.org/ticket/20094#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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