Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Erik <python@lucidity.plus.com>
Newsgroups: comp.lang.python
Subject: Re: Accessing container's methods
Date: Tue, 8 Dec 2015 22:37:46 +0000
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References: <dcm0c2Fi2ktU1@mid.individual.net> <mailman.41.1449532084.12405.python-list@python.org> <5516674.oipO6xLiNU@PointedEars.de>
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Xref: csiph.com comp.lang.python:100175

Annoyingly, there seemed to be no responses to the original question 
when I wrote that and then shortly after, I saw all the others (and we 
all pretty much said the same thing - so I'm not sure why I was singled 
out for special attention ;)).

On 08/12/15 19:02, Thomas 'PointedEars' Lahn wrote:
> Erik wrote:
> ^^^^
> Please fix, Erik #75656.

Fixed(*)

Thomas 'PointerEars', you have chosen to selectively quote snippets of 
code and comments out of context, so I think it's futile to respond to 
those arguments individually. The original request (if you read it) was 
to return a string that said, essentially, "I am element 2 of 3 in my 
container".

You posted a "Quickhack" (which, to be fair, is an accurate description) 
which is incomplete, has errors and makes no sense in the context of the 
original question. We all know we can create a list in Python (of parent 
objects or whatever), but I think that if you expanded on that class a 
bit more (methods for the containers to update the contained objects on 
just what their index/key is etc) that you'll soon realise it's not a 
scalable option.

Also, WRT the original question, what is the method supposed to return 
now? "I am element 0 of 3 in container <FOO>, key 'bar' of ('bar', 
'foo', 'spam') in container <BAR>"? Just curious.

I'm interested in this response though:

 >> Generally, an object should not need to know which container it's in
 >
 > NAK.  All kinds of objects already "know" which container they are in.

Please elucidate. Examples from the standard library would be interesting.

E.

(*) In the sense that it's not going to change ;)