which methods to use?
steve at REMOVE.THIS.cybersource.com.au
Fri Mar 30 15:01:43 CEST 2007
On Thu, 29 Mar 2007 14:55:04 -0300, Gabriel Genellina wrote:
> En Thu, 29 Mar 2007 01:56:15 -0300, Steven D'Aprano
> <steve at REMOVE.THIS.cybersource.com.au> escribió:
>> By the way, "id(obj) == id(another_object)" is just a long way of writing
>> "obj is another_object".
> Just as a side note: that's not true, testing by id() only works if both
> objects are alive at the same time.
> py> id(object()) == id(object())
> py> object() is object()
That's weird. How on earth does that happen?
> So using the `is` operator is the only safe way to test for identity.
But if an object can be garbage collected before the is operator does the
comparison, how can that be safe?
More information about the Python-list