#5047: [with patch, needs review] comparing complex i raises error
------------------------------+---------------------------------------------
Reporter: burcin | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-3.3
Component: basic arithmetic | Resolution:
Keywords: |
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Changes (by SimonKing):
* summary: comparing complex i raises error => [with patch, needs
review] comparing complex i raises error
Comment:
Replying to [comment:1 SimonKing]:
> In Python, one gets
> {{{
> >>> cmp(1j,0)
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> TypeError: no ordering relation is defined for complex numbers
> }}}
With the patch, one gets
{{{
sage: cmp(i,0)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/king/.sage/temp/mpc739/25379/_home_king__sage_init_sage_0.py in
<module>()
----> 1
2
3
4
5
/home/king/SAGE/devel/sage-3.2.1/local/lib/python2.5/site-
packages/sage/functions/functions.pyc in __cmp__(self, right)
270 c = cmp(R(self), R(right))
271 except TypeError:
--> 272 raise TypeError, "these objects are not comparable"
273 if c: return c
274 try:
TypeError: these objects are not comparable
}}}
which, I believe, is consistent with python.
Other comparisons still work:
{{{
sage: cmp(i^2,0)
-1
sage: cmp(e,0)
1
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5047#comment:2>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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