Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #37074 > unrolled thread

Re: Any built-in ishashable method ?

Back to article view | Back to comp.lang.python

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: Any built-in ishashable method ? Peter Otten <__peter__@web.de> - 2013-01-19 09:49 +0100

#37074 — Re: Any built-in ishashable method ?

Dave Angel wrote:

> 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.

Of course.

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

And that I read because my expectations won over the actual text.

[toc] | [standalone]

Back to top | Article view | comp.lang.python

csiph-web