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. _______________________________________________ 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
