append on lists
grante at visi.com
Tue Sep 16 15:54:39 CEST 2008
On 2008-09-16, Armin <a at nospam.org> wrote:
> Duncan Booth wrote:
>> "Chris Rebert" <clp at rebertia.com> wrote:
>>> On Tue, Sep 16, 2008 at 1:20 AM, Armin <a at nospam.org> wrote:
>>>> [1,2,3,4,7].append(c) -> Is this a valid expression?
>>> Literally, no, because you can't call methods on literals.
>> Rubbish. There is no restriction about calling methods on literals. That
>> expression is perfectly valid but has no practical use that I can see.
> The semantic of [1,2,3,4,7].append(c) and [1,2,3,4,7] + c
> (with c = [8,9]) is identical,
No, they're not:
[1, 2, 3, 4, 7, [9, 10]]
[1, 2, 3, 4, 7, 9, 10]
You really ought to install a copy of Python so you can try out
things and see how they really work.
> but the first expression doesn't provide a value. Strange by
> design ...
Not really. You just need to make a little effort to
understand the reasoning (which has been explained to you)
behind Python's design decision.
Grant Edwards grante Yow! Somewhere in DOWNTOWN
at BURBANK a prostitute is
visi.com OVERCOOKING a LAMB CHOP!!
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