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Wed Jun 23 01:17:54 CEST 2010 · https://mail.python.org/pipermail/python-dev/2010-June/100936.html

On Jun 22, 2010, at 3:59 PM, Michael Foord wrote:

> On 23/06/2010 00:03, Greg Ewing wrote:
>> Benjamin Peterson wrote:
>> 
>>> IIRC this was because UserDict tries to be a MutableMapping but abcs
>>> require new style classes.
>> 
>> Are there any use cases for UserList and UserDict in new
>> code, now that list and dict can be subclassed?
> 
> Inheriting from list or dict isn't very useful as you to have to override *every* method to control behaviour.

Benjamin fixed the UserDict  and ABC problem earlier today in r82155.
It is now the same as it was in Py2.6.
Nothing to see here.
Move along.

Raymond

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[Python-Dev] UserDict in 2.7