[Zope-dev] ZTK 2.0: Deprecate zope.sequencesort

[Tres Seaver]

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On 02/28/2013 01:04 PM, Stephan Richter wrote:
> On Thursday, February 28, 2013 11:32:26 AM Tres Seaver wrote:
>>> Thoughts?
>> 
>> I'm generally in favor of shrinking the ZTK, but just for
>> discussion's sake:  emulating 'cmp' for objects which have rich
>> comparison semantics isn't that difficult::
>> 
>> def _faux_cmp(lhs, rhs): return int(rhs < lhs) - int(lhs < rhs)
> 
> Well, that is the obvious implementation of cmp(), but that's not the
> point of the package. The package provides a callable class that
> represents a cmp() function. The problem is that it is not just
> creating some keys and calls cmp() on it. I could not find out a way
> to create a single key.

The main export of the package is the 'sort' function, which takes a
sequence, per-column sort specs (key/attr name, sort function,
direction), and optional extra data (e.g., the DTML namespace) and a flag
indicating whether to use key or attribute lookup.  The 'SortBy' class is
really just an implementation detail of that API.

> I guess the right way to port the package is to implement a sort API.

I have ported it to Python 3.2 and 3.3 and released a 4.0.0 version.


Tres.
- -- 
===================================================================
Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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