For review: PEP 308 - If-then-else expression

[Aahz]

In article <3E460511.AB633977 at alcyone.com>,
Erik Max Francis  <max at alcyone.com> wrote:
>
>This frequency metric for judging whether a feature is warranted is a
>red herring, it seems to me.

What was implicit in mentioning frequency, I think, is that the actual
metric is frequency times power.  Metaclasses are very, very powerful,
so even a low frequency gives them many "feature points".  Also,
metaclasses came essentially for free with new-style classes, which have
many other reasons for existing.  Conditional expressions don't have
much power, so they need a high useful frequency to warrant changing the
language.

Compare, for example, the high frequency with which booleans will
permeate the codebase now that they exist.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Register for PyCon now!  http://www.python.org/pycon/reg.html