Any built-in ishashable method ?

Dave Angel d at davea.name
Fri Jan 18 13:29:21 CET 2013


On 01/18/2013 07:06 AM, Peter Otten wrote:
> Jean-Michel Pichavant wrote:
>
>> That brings me to another question, is there any valid test case where
>> key1 != key2 and hash(key1) == hash(key2) ? Or is it some kind of design
>> flaw ?
>
> I don't think there is a use case for such a behaviour other than annoying
> your collegues ;)
>

Beg to differ.  Nothing wrong with getting the same hash on objects that 
compare different.  It's called a hash collision, and is quite common, 
especially in large collections.

The problem is the converse of this, where the objects compare equal, 
but they have different hashes.

-- 
DaveA



More information about the Python-list mailing list