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Groups > comp.lang.python > #17292
| Date | 2011-12-15 18:06 +0000 |
|---|---|
| From | MRAB <python@mrabarnett.plus.com> |
| Subject | Re: test for list equality |
| References | <45d59336-7e75-4865-8573-56742b37097c@s26g2000yqd.googlegroups.com> <61edc02c-4f86-45ef-82a1-61c7013003b4@t38g2000yqe.googlegroups.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.3683.1323972336.27778.python-list@python.org> (permalink) |
On 15/12/2011 17:49, noydb wrote: > On Dec 15, 11:36 am, noydb<jenn.du...@gmail.com> wrote: >> I want to test for equality between two lists. For example, if I have >> two lists that are equal in content but not in order, I want a return >> of 'equal' -- dont care if they are not in the same order. In order >> to get that equality, would I have to sort both lists regardless? if >> yes, how (having issues with list.sort)? >> >> Another way i tried, that I think is kind-of roundabout is like >> x = [2, 5, 1, 88, 9] >> y = [5, 2, 9, 1, 88] >> inBoth = list(set(x)& set(y)) >> >> and then test that list.count is equal between inBoth and x and/or y. >> >> Any better suggestions? >> >> Thanks for any help! > > My sort issue... as in this doesn't work >>>> if x.sort == y.sort: > ... print 'equal' > ... else: > ... print 'not equal' > ... > not equal > > > ??? .sort is a method which sorts the list in-place and returns None. You must provide the () if you want to call it, otherwise you just get a reference to the method: >>> x [2, 5, 1, 88, 9] >>> x.sort <built-in method sort of list object at 0x00A58508> >>> x.sort() >>> x [1, 2, 5, 9, 88] There's also a function "sorted" which returns its argument as a sorted list. The argument itself isn't altered: >>> y = [5, 2, 9, 1, 88] >>> sorted(y) [1, 2, 5, 9, 88] >>> y [5, 2, 9, 1, 88] It's all in the documentation! :-)
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test for list equality noydb <jenn.duerr@gmail.com> - 2011-12-15 08:36 -0800
Re: test for list equality noydb <jenn.duerr@gmail.com> - 2011-12-15 09:49 -0800
Re: test for list equality John Gordon <gordon@panix.com> - 2011-12-15 17:57 +0000
Re: test for list equality Miki Tebeka <miki.tebeka@gmail.com> - 2011-12-15 09:59 -0800
Re: test for list equality MRAB <python@mrabarnett.plus.com> - 2011-12-15 18:12 +0000
Re: test for list equality darnold <darnold992000@yahoo.com> - 2011-12-15 10:12 -0800
Re: test for list equality Tim Chase <python.list@tim.thechases.com> - 2011-12-15 12:20 -0600
Re: test for list equality Miki Tebeka <miki.tebeka@gmail.com> - 2011-12-15 10:25 -0800
Re: test for list equality Miki Tebeka <miki.tebeka@gmail.com> - 2011-12-15 10:25 -0800
Re: test for list equality Terry Reedy <tjreedy@udel.edu> - 2011-12-15 20:02 -0500
Re: test for list equality Stefan Behnel <stefan_ml@behnel.de> - 2011-12-15 19:01 +0100
Re: test for list equality noydb <jenn.duerr@gmail.com> - 2011-12-15 10:07 -0800
Re: test for list equality Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-15 11:28 -0700
Re: test for list equality noydb <jenn.duerr@gmail.com> - 2011-12-15 10:32 -0800
Re: test for list equality MRAB <python@mrabarnett.plus.com> - 2011-12-15 18:06 +0000
Re: test for list equality MRAB <python@mrabarnett.plus.com> - 2011-12-15 17:54 +0000
Re: test for list equality Alec Taylor <alec.taylor6@gmail.com> - 2011-12-16 17:30 +1100
Re: test for list equality Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-16 00:11 -0700
Re: test for list equality Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-16 00:32 -0700
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