#14285: Add __len__ and cardinality to cartesian_product_iterator and
CartesianProduct
---------------------------------+------------------------------------------
Reporter: roed | Owner: jason
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.9
Component: combinatorics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers: Julian Rueth
Authors: David Roe | Merged in:
Dependencies: | Stopgaps:
---------------------------------+------------------------------------------
Changes (by jdemeyer):
* status: positive_review => needs_work
Comment:
On 32-bit systems:
{{{
sage -t --long devel/sage/sage/misc/mrange.py
**********************************************************************
File "devel/sage/sage/misc/mrange.py", line 62, in
sage.misc.mrange._is_finite
Failed example:
_is_finite(xrange(10^10))
Exception raised:
Traceback (most recent call last):
File
"/var/lib/buildbot/build/sage/arando-1/arando_full/build/sage-5.9.beta1/local/lib/python2.7
/site-packages/sage/doctest/forker.py", line 459, in _run
self.execute(example, compiled, test.globs)
File
"/var/lib/buildbot/build/sage/arando-1/arando_full/build/sage-5.9.beta1/local/lib/python2.7
/site-packages/sage/doctest/forker.py", line 815, in execute
exec compiled in globs
File "<doctest sage.misc.mrange._is_finite[4]>", line 1, in <module>
_is_finite(xrange(Integer(10)**Integer(10)))
OverflowError: Python int too large to convert to C long
**********************************************************************
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14285#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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