Re: Any built-in ishashable method ?

Discussion in 'Python' started by Peter Otten, Jan 19, 2013.

  1. Peter Otten

    Peter Otten Guest

    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.
    Peter Otten, Jan 19, 2013
    #1
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