[Python-Dev] PEP for adding an sq_index slot so that any object, a or b, can be used in X[a:b] notation

Adam Olsen rhamph at gmail.com
Thu Feb 9 10:47:40 CET 2006

On 2/9/06, Travis Oliphant <oliphant.travis at ieee.org> wrote:
> Guido seemed accepting to this idea about 9 months ago when I spoke to
> him.  I finally got around to writing up the PEP.   I'd really like to
> get this into Python 2.5 if possible.


I've detailed my reasons here:

In short, there are purely math usages that want to convert to int
while raising exceptions from inexact results.  The name __index__
seems inappropriate for this, and I feel it would be cleaner to fix
float.__int__ to raise exceptions from inexact results (after a
suitable warning period and with a trunc() function added to math.)

Adam Olsen, aka Rhamphoryncus

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