#20340: GRS decode_to_code and decode_to_message fail on messages in the code
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Reporter: cprior | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.2
Component: coding theory | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Currently, the following occurs
{{{
#!python
sage: F = GF(59)
sage: length = 40
sage: dimension = 12
sage: eval_pts = F.list()[:length]
sage: col_mults = F.list()[1:length+1]
sage: C = codes.GeneralizedReedSolomonCode(eval_pts, dimension, col_mults)
sage: msg = random_vector(F, dimension)
sage: c = C.encode(msg)
sage: c in C
True
sage: c.decode_to_code(c)
7 # random; first entry of msg (expected c)
sage: c.decode_to_message(c)
Traceback (most recent call last)
...
TypeError: 'sage.rings.finite_rings.integer_mod.IntegerMod_int' object is
not iterable
}}}
We expect:
{{{
#!python
...
sage: c.decode_to_code(c) == c
True
sage: c.decode_to_message(c) == msg
True
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/20340>
Sage <http://www.sagemath.org>
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