[Python-Dev] ABC issues (original) (raw)

Raymond Hettinger python at rcn.com
Tue May 27 19:44:31 CEST 2008

* 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

More information about the Python-Dev mailing list