Re: Question about sorted in Python 3.0rc1

[Sion Arrowsmith]

josh logan <dear.jay.logan @gmail.comwrote :

>sorted(P) # throws TypeError: unorderable types Player() < Player()
>
>The sorted function works when I define __lt__.
>I must be misreading the documentation, because I read for the
>documentatio n __cmp__ that it is called if none of the other rich
>comparison functions are defined.

You're either misreading or forgetting that __eq__ and __ne__,
which you define, are rich comparison functions. __cmp__ will only
be called for a comparison when *none* of the rich comparison
functions are defined, not just the one in question.

--
\S -- siona@chiark.gr eenend.org.uk -- http://www.chaos.org.uk/~sion/
"Frankly I have no feelings towards penguins one way or the other"
-- Arthur C. Clarke
her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump

[josh logan]

Re: Question about sorted in Python 3.0rc1

On Sep 22, 7:32 am, Sion Arrowsmith <si...@chiark.g reenend.org.uk>
wrote:

josh logan  <dear.jay.lo... @gmail.comwrote :
>

sorted(P) # throws TypeError: unorderable types Player() < Player()

>

The sorted function works when I define __lt__.
I must be misreading the documentation, because I read for the
documentation __cmp__ that it is called if none of the other rich
comparison functions are defined.

>
You're either misreading or forgetting that __eq__ and __ne__,
which you define, are rich comparison functions. __cmp__ will only
be called for a comparison when *none* of the rich comparison
functions are defined, not just the one in question.
>
--
\S -- si...@chiark.gr eenend.org.uk --http://www.chaos.org.u k/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump

Hello Sion,

When I don't define the __eq__ and __ne__ comparison functions, the
same unexpected behavior occurs.