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Re: Extracting elements over multiple lists?

References (1 earlier) <j995eq$vr9$1@news.univ-fcomte.fr> <cf007146-3a08-44c4-bf01-d1a9253c83e3@o19g2000vbk.googlegroups.com> <4EB828B3.1020509@sequans.com> <5B80DD153D7D744689F57F4FB69AF4740182FE@SCACMX008.exchad.jpmchase.net> <4EC2ACCC.2000100@davea.name>
Date 2011-11-16 06:53 +1100
Subject Re: Extracting elements over multiple lists?
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.2745.1321386809.27778.python-list@python.org> (permalink)

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On Wed, Nov 16, 2011 at 5:17 AM, Dave Angel <d@davea.name> wrote:
> a = someexpression...
> b = a
> ....
> del a
>
> Does not (necessarily) delete the object that a refers to.  It merely
> deletes the symbol a.

I'd have to classify that as part of the change of thinking necessary
for a refcounted language, and not specific to del at all. The del
statement is identical to "a = None" in terms of deleting objects;
someone who's come from C++ might want to explicitly del every
variable before returning, but that's the only way that it's tied to
'del'.

ChrisA

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Extracting elements over multiple lists? JoeM <josephmeiring@gmail.com> - 2011-11-07 09:12 -0800
  Re: Extracting elements over multiple lists? John Gordon <gordon@panix.com> - 2011-11-07 17:37 +0000
  Re: Extracting elements over multiple lists? Laurent Claessens <moky.math@gmail.com> - 2011-11-07 18:44 +0100
    Re: Extracting elements over multiple lists? JoeM <josephmeiring@gmail.com> - 2011-11-07 10:01 -0800
      Re: Extracting elements over multiple lists? John Gordon <gordon@panix.com> - 2011-11-07 18:22 +0000
        Re: Extracting elements over multiple lists? Terry Reedy <tjreedy@udel.edu> - 2011-11-07 19:06 -0500
      Re: Extracting elements over multiple lists? Peter Otten <__peter__@web.de> - 2011-11-07 19:33 +0100
      Re: Extracting elements over multiple lists? Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-11-07 19:51 +0100
      Re: Extracting elements over multiple lists? Dave Angel <d@davea.name> - 2011-11-07 15:06 -0500
      Re: Extracting elements over multiple lists? Laurent Claessens <moky.math@gmail.com> - 2011-11-08 08:07 +0100
      RE: Extracting elements over multiple lists? "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2011-11-15 17:01 +0000
        Re: Extracting elements over multiple lists? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-15 22:21 +0000
      Re: Extracting elements over multiple lists? Dave Angel <d@davea.name> - 2011-11-15 13:17 -0500
      Re: Extracting elements over multiple lists? Chris Angelico <rosuav@gmail.com> - 2011-11-16 06:53 +1100
        Re: Extracting elements over multiple lists? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-15 22:25 +0000
          Re: Extracting elements over multiple lists? Chris Angelico <rosuav@gmail.com> - 2011-11-16 09:54 +1100
    Re: Extracting elements over multiple lists? Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2011-11-07 19:06 +0100

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