On Tue, 27 Oct 2009 08:54:52 am Nick Coghlan wrote: > Raymond Hettinger wrote: > > [GvR] > > > >> I still wish we could go back in time and unify sets and dicts, if > >> only to find out how that experiment would turn out. > > > > I'm curious about the outcome of another experiment along those > > lines. Is anyone seeing uptake for the set methods on mapping views > > in Py3.x? > > > > I haven't seen any code using it, nor any bug reports or > > documentation requests, nor any code in the ASPN cookbook, nor > > mention of it on the newsgroup or python-help. > > > > Has anyone here seen any hints about how this is faring in the > > wild? > > If anyone is looking for further explanation as to why Guido's > moratorium on core language changes is a good idea, allowing a chance > for answers to questions like Raymond's above a chance to evolve > naturally is what I see as the most important rationale.
I don't understand that rationale. Let's take a concrete example. The new `yield from` syntax was accepted but now will be delayed by the moratorium. How would the addition of `yield from` delay or prevent people using set methods on mapping views? If a proposed feature directly competes with a feature in 3.x, then it might delay usage of the 3.x feature -- but if that were the case, the proposal would almost certainly be rejected on the basis that 3.x already has a feature to do that very thing. -- Steven D'Aprano _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
