#13694: Implement __getitem__ for LinearCode
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Reporter: ppurka | Owner: wdj
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.5
Component: coding theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Punarbasu Purkayastha | Merged in:
Dependencies: #12014, #13417 | Stopgaps:
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Changes (by {'newvalue': u'Punarbasu Purkayastha', 'oldvalue': ''}):
* status: new => needs_review
* author: => Punarbasu Purkayastha
Old description:
> The current implementation of `__getitem__` for a `LinearCode` element
> tries to generate the whole list of codewords and then returns the
> element needed. This makes it impossible to work with this since for
> linear codes of large dimensions, the generation of all the codewords is
> not only unnecessary, but it also eats up several gigabytes of memory.
>
> The attached patch implements `__getitem__` for a linear code.
New description:
The current implementation of `__getitem__` for a `LinearCode` element
tries to generate the whole list of codewords and then returns the element
needed. This makes it impossible to work with this since for linear codes
of large dimensions, the generation of all the codewords is not only
unnecessary, but it also eats up several gigabytes of memory.
The attached patch implements `__getitem__` for a linear code.
----
Apply
1. #13417
2. #12014
3. [attachment:trac_13694-implement_getitem.patch] to `devel/sage`
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13694#comment:1>
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