[Python-3000] Location of UserDict, UserList, and UserString

[Steven Bethard]

On Feb 9, 2008 2:33 PM, Raymond Hettinger <python at rcn.com> wrote:
> In the process of getting UserDict updated to subclass from MutableMapping,
> it ended-up in the collections module during the transistion.  Probably, all three
> should end-up in the same place, either in the collections module or in their own
> modules.  What do you guys think?  Do you like them in collections or as
> separate modules?

+1 for putting them in the collections module.

> Also, I'm wondering if it is time for UserString to bite the dust. It isn't really
> useful in the same way a UserDict or UserList which have two principal use
> cases. One, for testing to make sure that simulated dicts and lists are
> substitutable for real lists and dicts.

I thought this was the point of DictMixin, not UserDict, no?

> Two, for convenience in subclassing  where it's easier to write "self.data[k]"
> than "dict.__getitem__(self, k)" throughout.

Interesting.  I'd never seen this before, but a Google code search
reveals that it is reasonably common.  Too bad.  I was hoping that the
new ABCs would eliminated the need for UserDict and UserList
entirely...

STeVe
-- 
I'm not *in*-sane. Indeed, I am so far *out* of sane that you appear a
tiny blip on the distant coast of sanity.
        --- Bucky Katt, Get Fuzzy