#7520: Improving word construction
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Reporter: slabbe | Owner: mhansen
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.3
Component: combinatorics | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
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Changes (by slabbe):
* status: new => needs_work
Comment:
My patch needs work:
{{{
sage: P = WordPaths([0,1,2,3])
sage: P
Word Paths on the square grid
sage: w = words.ChristoffelWord(5,8)
sage: P(w)
Traceback (most recent call last):
...
AttributeError: 'LowerChristoffelWord' object has no attribute
'_class_str'
}}}
I must admit my patch was not that clean and it now shows its limits. The
problem concerns the creation of a word from a word especially when the
parent changes. Should we try to use some sort of shorcut (like simply
change some important attributes like `__class__`) or not? I have an idea
of something better which doesn't use any shortcut. For example, if the
input word is a `FiniteWord_list`, we could simply restore the list and
pass through the usual steps for when the input is a list. I think this
should be more safe. I just have to think for a solution what we do when
the word is defined as an iterator. A new patch (with cleaner code) to be
posted soon.
Ideas are welcome.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7520#comment:3>
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