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Groups > comp.lang.python > #69747
| Date | 2014-04-06 00:25 -0700 |
|---|---|
| From | Gary Herron <gary.herron@islandtraining.com> |
| Subject | Re: Mutable objects inside tuples - good or bad? |
| References | <89df32f9-c8ae-4b7b-bfc4-01c574aabcae@googlegroups.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.8939.1396769507.18130.python-list@python.org> (permalink) |
On 04/05/2014 11:53 PM, John Ladasky wrote: > I find this programming pattern to be useful... but can it cause problems? No. What kind of problems are you considering? It won't break Python. It's perfectly legal code. The tuple c is still immutable, consisting of two specific objects, and (as always) without regard to the specifics or contents of those two objects. Gary Herron > > Python 3.3.2+ (default, Feb 28 2014, 00:52:16) > [GCC 4.8.1] on linux > Type "help", "copyright", "credits" or "license" for more information. >>>> a = [1,2,3] >>>> b = [4,5,6] >>>> c = (a,b) >>>> c > ([1, 2, 3], [4, 5, 6]) >>>> c[0][0] = 0 >>>> c > ([0, 2, 3], [4, 5, 6]) > > Comments appreciated.
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Mutable objects inside tuples - good or bad? John Ladasky <john_ladasky@sbcglobal.net> - 2014-04-05 23:53 -0700
Re: Mutable objects inside tuples - good or bad? Gary Herron <gary.herron@islandtraining.com> - 2014-04-06 00:25 -0700
Re: Mutable objects inside tuples - good or bad? Devin Jeanpierre <jeanpierreda@gmail.com> - 2014-04-06 00:55 -0700
Re: Mutable objects inside tuples - good or bad? Rustom Mody <rustompmody@gmail.com> - 2014-04-06 08:07 -0700
Re: Mutable objects inside tuples - good or bad? Chris Angelico <rosuav@gmail.com> - 2014-04-06 18:25 +1000
Re: Mutable objects inside tuples - good or bad? Devin Jeanpierre <jeanpierreda@gmail.com> - 2014-04-06 04:01 -0700
Re: Mutable objects inside tuples - good or bad? Paul Kölle <paul@subsignal.org> - 2014-04-07 17:26 +0200
Re: Mutable objects inside tuples - good or bad? Chris Angelico <rosuav@gmail.com> - 2014-04-08 01:44 +1000
Re: Mutable objects inside tuples - good or bad? Paul Kölle <paul@subsignal.org> - 2014-04-07 21:46 +0200
Re: Mutable objects inside tuples - good or bad? Chris Angelico <rosuav@gmail.com> - 2014-04-08 08:47 +1000
Re: Mutable objects inside tuples - good or bad? Terry Reedy <tjreedy@udel.edu> - 2014-04-07 20:16 -0400
Re: Mutable objects inside tuples - good or bad? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-04-08 02:53 +0000
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