May 27, 2008
5:44 p.m.
* The 2.6-backported Mapping ABC has the 3.0 dict API, that is, it uses keys() that returns a view etc.
Curious to hear what Guido thinks about this one. A nice use of the Mapping ABC is to be able to get 3.0 behaviors. I thought that was the whole point of all these backports. If the ABC gets altered, then it just makes the 2-to-3 conversion harder.
It's wrong if the ABC doesn't describe the behavior of actual implementations; that is its primary purpose, the mixin class is a nice side benefit.
ISTM, the one purpose of backporting is to make 2.6 closer to 3.0. Altering the API will just make them further apart. Raymond