[program-l] Re: Silly Python Question
- From: "Homme, James" <james.homme@xxxxxxxxxxxx>
- To: "program-l@xxxxxxxxxxxxx" <program-l@xxxxxxxxxxxxx>
- Date: Tue, 16 Oct 2012 14:51:48 +0000
Hi Tyler,
I just fired up the Python interpreter. When I type
dir(__builtins__)
I see the len function, or at least I assume that's what it is, but the closest
thing I see to del is delattr. So where does del come from?
Thanks.
Jim
From: program-l-bounce@xxxxxxxxxxxxx [mailto:program-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Littlefield, Tyler
Sent: Tuesday, October 16, 2012 10:25 AM
To: program-l@xxxxxxxxxxxxx
Subject: [program-l] Re: Silly Python Question
Because len and the others call foo.__len__. It's a quick way at getting at
those methods without having to call them yourself, so any class can implement
a __len__ method and len would work on it.
On 10/16/2012 7:08 AM, Homme, James wrote:
Hi,
I tend to obsess about things sometimes. I was looking at the Python Standard
Library documentation and reading about lists, dictionaries, and files, and I
started to wonder why len, del, and open are part of the built-in's, if that's
the right term, rather than methods of the objects called dictionary, list, and
file. Just saying.
Jim
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Take care,
Ty
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