Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #17289
| From | Stefan Behnel <stefan_ml@behnel.de> |
|---|---|
| Subject | Re: test for list equality |
| Date | 2011-12-15 19:01 +0100 |
| References | <45d59336-7e75-4865-8573-56742b37097c@s26g2000yqd.googlegroups.com> <61edc02c-4f86-45ef-82a1-61c7013003b4@t38g2000yqe.googlegroups.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.3679.1323972097.27778.python-list@python.org> (permalink) |
noydb, 15.12.2011 18:49: > On Dec 15, 11:36 am, noydb 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 alist.sort() is a method, so you have to call it in order to execute it. alist.sort will only give you a reference to the method. Comparing that to another method reference returns False, as expected. Also, calling it does not return anything (useful), it modifies the list in place. If you want to create a new list (which you don't want in this case, but anyway), you can use the sorted() builtin function. Stefan
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
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
csiph-web