On sam., 2014-02-22 at 20:54 +0900, Stephen J. Turnbull wrote: > Antoine Pitrou writes: > > On sam., 2014-02-22 at 19:29 +0900, Stephen J. Turnbull wrote: > > > Antoine Pitrou writes: > > > > > > > Well, the only way to know that a key (or attribute) exists is to do > > > > the lookup. What else would you suggest? > > > > > > Do the lookup at the C level (or whatever the implementation language > > > is) and generate no exception, of course. That's what would make it > > > possibly more efficient. > > > > Let's see: > > - hasattr() does the lookup at the C level, and silences the > > AttributeError > > - dict.get() does the lookup at the C level, and doesn't generate an > > exception > > > > So apart from the minor inefficiency of generating and silencing the > > AttributeError, those functions already do what you suggest. > > But that's precisely the inefficiency I'm referring to.
Sure, but complaining about inefficiencies without asserting their significance is not very useful. Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
