Tim Hochberg wrote:
> Rewriting this using "distributed" adapters looks like this:
>
> >>> pprint = Protocol('pprint')
I suppose this means that Protocol('pprint') implies an interface like:
class IPprint(Interface):
def __call__(object):
"""print the pretty representation of the object"""
Viewed from this perspective, RuleDispatch-style generic functions use
the default implementation as the description of the interface, and only
allow for callable interfaces.
> >>> @pprint.when(object)
> ... def pprint_obj(obj):
> ... print repr(obj)
>
> >>> @pprint.when(list)
> ... def pprint_list(obj):
> ... print 'pretty(%r)' % obj
>
>
> Pretty similar! Stealing the when decorator cleans up the use of
> copy_reg.pickle rewrite a bit as well. I imagine that where these would
> diverge is when there is more than one argument.
>
>
> Regards,
>
> -tim
>
>
> P.S., Here's Protocol. To save a few bytes I've stripped classic class
> support.
I suppose on the py3k list we don't have to apologize for ignoring
classic classes ;)
--
Ian Bicking / [EMAIL PROTECTED] / http://blog.ianbicking.org
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