#18036: I.parent() should not be the symbolic ring
---------------------------------+------------------------
Reporter: vdelecroix | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: number fields | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:18 vdelecroix]:
> About having methods `.cos()`, `.sin()`, `.exp()`, it is already
something which I found dangerous with integers
Still, if we even want this new non-symbolic `I` to behave like to old
symbolic `I`, we would need to support things like that:
{{{
**********************************************************************
File "src/sage/symbolic/expression.pyx", line 7901, in
sage.symbolic.expression.Expression.log
Failed example:
I.log()
Exception raised:
Traceback (most recent call last):
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 496, in _run
self.compile_and_execute(example, compiler, test.globs)
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 858, in compile_and_execute
exec(compiled, globs)
File "<doctest sage.symbolic.expression.Expression.log[11]>", line
1, in <module>
I.log()
File "sage/structure/element.pyx", line 420, in
sage.structure.element.Element.__getattr__
(build/cythonized/sage/structure/element.c:4676)
return getattr_from_other_class(self, P._abstract_element_class,
name)
File "sage/structure/misc.pyx", line 259, in
sage.structure.misc.getattr_from_other_class
(build/cythonized/sage/structure/misc.c:1772)
raise dummy_attribute_error
AttributeError:
'sage.rings.number_field.number_field_element_quadratic.NumberFieldElement_quadratic'
object has no attribute 'log'
**********************************************************************
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18036#comment:20>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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