[Python-Dev] PEP 343 and __with__
Phillip J. Eby
pje at telecommunity.com
Mon Oct 3 21:20:34 CEST 2005
At 07:02 PM 10/3/2005 +0100, Michael Hudson wrote:
>"Phillip J. Eby" <pje at telecommunity.com> writes:
> > Since the PEP is accepted and has patches for both its implementation
> and a
> > good part of its documentation, a major change like this would certainly
> > need a better rationale.
>Though given the amount of interest said patch has attracted (none at
Actually, I have been reading the patch and meant to comment on it. I was
perplexed by the odd stack behavior of the new opcode until I realized that
it's try/finally that's weird. :) I was planning to look into whether
that could be cleaned up as well, when I got distracted and didn't go back
> perhaps noone cares very much and the proposal should be dropped.
I care an awful lot, as 'with' is another framework-dissolving tool that
makes it possible to do more things in library form, without needing to
resort to template methods. It also enables more context-sensitive
programming, in that "global" states can be set and restored in a
structured fashion. It may take a while to feel the effects, but it's
going to be a big improvement to Python, maybe as big as new-style classes,
and certainly bigger than decorators.
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