Hm... Reading this draft, I like the idea of using "raise X from None", but I still have one quibble. It seems the from clause sets __cause__, and __cause__ can indicate three things: (1) print __cause__ (explicitly set), (2) print __context__ (default), (3) print neither (raise X from None). For (1), __cause__ must of course be a traceback object. The PEP currently proposes to use two special values: False for (2), None for (3). To me, this has a pretty strong code smell, and I don't want this pattern to be enshrined in a PEP as an example for all to follow. (And I also don't like "do as I say, don't do as I do." :-)
Can we think of a different special value to distinguish between (2) and (3)? Ideally one that doesn't change the nice "from None" idiom, which I actually like as a way to spell this. Sorry that life isn't easier, --Guido On Tue, Jan 31, 2012 at 9:14 PM, Nick Coghlan <ncogh...@gmail.com> wrote: > On Wed, Feb 1, 2012 at 1:57 PM, Ethan Furman <et...@stoneleaf.us> wrote: >> I haven't seen any further discussion here or in the bug tracker. Below is >> the latest version of this PEP, now with a section on Language Details. >> >> Who makes the final call on this? Any idea how long that will take? (Not >> that I'm antsy, or anything... ;) > > Guido still has the final say on PEP approvals as BDFL - it's just > that sometimes he'll tap someone else and say "Your call!" (thus > making them a BDFOP - Benevolent Dictator for One PEP). > > FWIW, I'm personally +1 on the latest version of this. > > Cheers, > Nick. > > -- > Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia > _______________________________________________ > 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/guido%40python.org -- --Guido van Rossum (python.org/~guido) _______________________________________________ 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
