22 Feb
2014
22 Feb
'14
12:54 p.m.
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.