#14285: Add __len__ and cardinality to cartesian_product_iterator
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Reporter: roed | Owner: tbd
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.9
Component: PLEASE CHANGE | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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If cartesian_product_iterator has a `__len__` method we can use it in
`random.sample`.
We also fix a bug that yields an infinite loop:
{{{
sage: for a in cartesian_product_iterator([ZZ,[]]):
....: print "hello world"
<INFINITE LOOP>
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14285>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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