#11779: python ints vs sage ints with respect to powers weirdness
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Reporter: dimpase | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.7.2
Component: coercion | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: Dmitrii Pasechnik
Merged: | Dependencies:
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Description changed by dimpase:
Old description:
> {{{
> print type(int(3) + 3)
> print type(int(3) * 3)
> print type(3 ^ int(3))
> print type(int(3) ^ 3)
> }}}
> first three are Sage Integers but last one is just a Python int.
> Worse still:
> {{{
> sage: int(3)^-3
> 0.037037037037037035
> sage: type(int(3)^-3)
> <type 'float'>
> sage: int(3)^QQ(-3)
> 1/27
> sage: type(int(3)^QQ(-3))
> <type 'sage.rings.rational.Rational'>
> }}}
> is very inconsistent.
New description:
{{{
print type(int(3) + 3)
print type(int(3) * 3)
print type(3 ^ int(3))
print type(int(3) ^ 3)
}}}
first three are Sage Integers but last one is just a Python int.
Worse still:
{{{
sage: int(3)^-3
0.037037037037037035
sage: type(int(3)^-3)
<type 'float'>
sage: int(3)^QQ(-3)
1/27
sage: type(int(3)^QQ(-3))
<type 'sage.rings.rational.Rational'>
}}}
is very inconsistent. As well as
{{{
sage: p(x)=x^-3
sage: p(int(3))
1/27
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11779#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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