#6436: ideal([]) gives unhelpful error message
---------------------+------------------------------------------------------
Reporter: broune | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone: sage-4.1
Component: algebra | Keywords:
Reviewer: | Author:
Merged: |
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When I type "ideal([])" in Sage 4.0.1 I get an error message intended for
a different case:
{{{
sage: ideal([])
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
...
TypeError: unable to find common ring into which all ideal generators map
}}}
This error message is incorrect since, trivially, the empty set of
generators will map into any ring at all. The attached patch changes this
to
{{{
sage: ideal([])
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
...
ValueError: unable to determine which ring to embed the ideal in
}}}
By the way, the function ideal in ideal.py has a documentation section
named TESTS with doctests in it. As far as I can determine, these doctests
do not get run.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6436>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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