#16436: is_real method should exist for elements of AA, ZZ, QQ
---------------------------+----------------------------
Reporter: slabbe | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.3
Component: algebra | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The function ``is_real`` is useful but it is not practical because it it
not implemented for every types of numbers in Sage. And I do not want to
do type checking before being able to use it in my code.
{{{
sage: CC(3).is_real()
True
sage: RR(3).is_real()
True
sage: SR(3).is_real()
True
sage: ZZ(3).is_real()
Traceback (most recent call last):
...
AttributeError: 'sage.rings.integer.Integer' object has no attribute
'is_real'
sage: QQ(3).is_real()
Traceback (most recent call last):
...
AttributeError: 'sage.rings.rational.Rational' object has no attribute
'is_real'
sage: AA(3).is_real()
Traceback (most recent call last)
...
AttributeError: 'AlgebraicReal' object has no attribute 'is_real'
}}}
I am sure I forget some other rings...
We need more of this kind of consistency in Sage. ``is_imaginary`` is
another example.
--
Ticket URL: <http://trac.sagemath.org/ticket/16436>
Sage <http://www.sagemath.org>
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