On Wed, Oct 3, 2012 at 1:26 PM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
C++ namespaces are useful for encapsulating related objects within a
single file, subdividing the global namespace without using classes.
Python has modules, but they come in separate files.
Using Python 3.3's ChainMap type, and some metaclass trickery, I abuse
the class keyword to (almost) emulate C++ namespaces:
Very interesting. I like the idea of continuing the namespace meme.
My idea of using the builtins (in the prior list thread of namespaces and
modules), is that if we overhaul the builtins, a unified data model could
emerge to incorporate whatever ideas one may have for namespaces (i.e.
enclosures with a name).
My idea was to introduce the compound data type (using a : colon to
separate two sides), whereby one associates a (*hashable*) name with an
object (meals:{breakfast,lunch,dinner}) . This has the extra
advantage of killing two warts in Python with one stone: {} now is the
empty set literal like people are taught, and a set of compounds makes a
dictionary (dict now has set operations available), something which, in
theory, should simply CPython implementation AND the python environment/API.
expose name put the dictionary (or whatever type is decided for the rhs)
into the builtin/global namespace.
I have further thoughts, but that's all I have at the moment
markj
gothenburg, nebraska
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