On Sat, Apr 12, 2008 at 12:26 PM, Georg Brandl <[EMAIL PROTECTED]> wrote: > Steven Bethard schrieb: > > > On Sat, Apr 12, 2008 at 8:26 AM, <[EMAIL PROTECTED]> wrote: > >> > >> Nick> That's exactly the problem though - while a 2to3 fixer can be > >> Nick> written for a tiny subset of formatting calls (those that meet > the > >> Nick> constraints you gave)... > >> > >> In my personal experience, either the LHS will be a string literal or the > >> RHS will be locals(), globals() or a tuple. Yes, you will have a hard, > if > >> not impossible, time with the general x % y. Still, I think a fixer that > >> only addresses the "tiny subset" would go a long ways to converting > existing > >> code. For the rest it could insert special comments so the programmer > can > >> grep for the problematic cases. > > > > Rather than inserting special comments, why don't we just introduce a > > -3 warning for using % string formatting? Then, you can use 2to3 to > > convert as much as it can, and you can use the -3 warning to identify > > any other places you're using % string formatting and fix them by > > hand. Adding such a -3 warning shouldn't be much more than a couple of > > lines at the beginning of stringobject.c:PyString_Format. > > Please don't -- a Py3k warning makes no sense if the feature isn't really > going away in Py3k. Py3k warnings really should only warn about things > that are going to break in 3.0.
My understanding is that we'd break % string formatting in Py3k if we could. The only reason we won't is that it's not generally possible to write a 2to3 fixer. So while it won't actually break, I think conveying our intention to break it (using a -3 warning) wouldn't be unreasonable. Steve -- I'm not *in*-sane. Indeed, I am so far *out* of sane that you appear a tiny blip on the distant coast of sanity. --- Bucky Katt, Get Fuzzy _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
