test for list equality

[Chris Kaynor]

On Thu, Dec 15, 2011 at 9:57 AM, John Gordon <gordon at panix.com> wrote:

> In <61edc02c-4f86-45ef-82a1-61c7013003b4 at t38g2000yqe.googlegroups.com>
> noydb <jenn.duerr at gmail.com> writes:
>
> > My sort issue... as in this doesn't work
> > >>> if x.sort =3D=3D y.sort:
> > ...   print 'equal'
> > ... else:
> > ...   print 'not equal'
> > ...
> > not equal
>
> > ???
>
> Use x.sort() instead of x.sort .
>

And you cannot use the method in-line - it mutates the list in place,
returning None.

If you either do not wish to mutate the list, or you absolutely want to do
the sort in-line, you need to use the sorted built-in:
if sorted(x) == sorted(y):
    ...

However, this will, temporary, use double the memory.



>
> --
> John Gordon                   A is for Amy, who fell down the stairs
> gordon at panix.com              B is for Basil, assaulted by bears
>                                -- Edward Gorey, "The Gashlycrumb Tinies"
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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