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Groups > comp.lang.python > #8251
| Date | 2011-06-23 01:34 +0100 |
|---|---|
| From | MRAB <python@mrabarnett.plus.com> |
| Subject | Re: writable iterators? |
| References | <mailman.296.1308770918.1164.python-list@python.org> <4e026497$0$29975$c3e8da3$5496439d@news.astraweb.com> <ittspg$5k2$1@dough.gmane.org> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.307.1308789287.1164.python-list@python.org> (permalink) |
On 23/06/2011 00:10, Neal Becker wrote: > Steven D'Aprano wrote: > >> On Wed, 22 Jun 2011 15:28:23 -0400, Neal Becker wrote: >> >>> AFAICT, the python iterator concept only supports readable iterators, >>> not write. Is this true? >>> >>> for example: >>> >>> for e in sequence: >>> do something that reads e >>> e = blah # will do nothing >>> >>> I believe this is not a limitation on the for loop, but a limitation on >>> the python iterator concept. Is this correct? >> >> Have you tried it? "e = blah" certainly does not "do nothing", regardless >> of whether you are in a for loop or not. It binds the name e to the value >> blah. >> > > Yes, I understand that e = blah just rebinds e. I did not mean this as an > example of working code. I meant to say, does Python have any idiom that allows > iteration over a sequence such that the elements can be assigned? > [snip] Python has references to objects, but not references to references.
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writable iterators? Neal Becker <ndbecker2@gmail.com> - 2011-06-22 15:28 -0400
Re: writable iterators? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-22 21:54 +0000
Re: writable iterators? Mel <mwilson@the-wire.com> - 2011-06-22 17:59 -0400
Re: writable iterators? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-06-23 01:30 +0200
Re: writable iterators? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-23 11:53 +1000
Re: writable iterators? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-06-23 12:23 +0200
Re: writable iterators? Neal Becker <ndbecker2@gmail.com> - 2011-06-22 19:10 -0400
Re: writable iterators? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-23 11:50 +1000
Re: writable iterators? MRAB <python@mrabarnett.plus.com> - 2011-06-23 01:34 +0100
Re: writable iterators? Ian Kelly <ian.g.kelly@gmail.com> - 2011-06-23 09:02 -0600
Re: writable iterators? Neal Becker <ndbecker2@gmail.com> - 2011-06-23 12:06 -0400
Re: writable iterators? Chris Torek <nospam@torek.net> - 2011-06-23 18:26 +0000
Re: writable iterators? Chris Torek <nospam@torek.net> - 2011-06-23 22:17 +0000
Re: writable iterators? Neal Becker <ndbecker2@gmail.com> - 2011-06-23 21:10 -0400
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