On Sun, Jul 31, 2016 at 4:40 PM, Steven D'Aprano wrote:
>> While neither is a syntax error, the latter is definitely a run-time
>> error:
>>
> mylist.sort().reverse()
>> Traceback (most recent call last):
>> File "", line 1, in
>> AttributeError: 'NoneType' object has no attribute 'reverse'
On Sunday, July 31, 2016 at 12:10:33 PM UTC+5:30, Steven D'Aprano wrote:
> On Sun, 31 Jul 2016 02:01 pm, D'Arcy J.M. Cain wrote:
>
> > On Sun, 31 Jul 2016 13:32:16 +1000
> > Steven D'Aprano wrote:
> >> Many beginners make the mistake of writing:
> >>
> >> mylist = mylist.sort()
> >>
> >> or try
On Sun, 31 Jul 2016 02:01 pm, D'Arcy J.M. Cain wrote:
> On Sun, 31 Jul 2016 13:32:16 +1000
> Steven D'Aprano wrote:
>> Many beginners make the mistake of writing:
>>
>> mylist = mylist.sort()
>>
>> or try to write:
>>
>> mylist.sort().reverse()
>>
>> If we had procedures, that would be an obv
On Sun, Jul 31, 2016, at 00:01, D'Arcy J.M. Cain wrote:
> On Sun, 31 Jul 2016 13:32:16 +1000
> Steven D'Aprano wrote:
> > Many beginners make the mistake of writing:
> >
> > mylist = mylist.sort()
> >
> > or try to write:
> >
> > mylist.sort().reverse()
> >
> > If we had procedures, that would
On Sun, Jul 31, 2016 at 1:32 PM, Steven D'Aprano wrote:
>> It means you can't
>> upgrade something from "always returns None" to "returns the number of
>> objects frobbed" without breaking compat.
>
> You shouldn't ever need to. At least that's the theory. In practice its not
> quite cut and dried
On Sun, 31 Jul 2016 13:32:16 +1000
Steven D'Aprano wrote:
> Many beginners make the mistake of writing:
>
> mylist = mylist.sort()
>
> or try to write:
>
> mylist.sort().reverse()
>
> If we had procedures, that would be an obvious error (possibly even a
> compile-time syntax error) instead of
Please keep the discussion on-list. (Reply-all, rather than just
replying to me.)
On Mon, 2009-06-22 at 15:36 -0700, Greg Reyna wrote:
> It's not the error that concerned me. The fact that there is an
> error of this type makes clear that there's something wrong with the
> way the scripts are
Greg Reyna wrote:
Learning
Python (on a Mac), with the massive help of Mark Lutz's excellent
book, "Learning Python".
What I want to do is this:
I've got a Class Object that begins with a def. It's designed to be
fed a string that looks like this:
"scene 1, pnl 1, 3+8, pnl 2, 1+12, pnl 3,
On Mon, 2009-06-22 at 12:13 -0700, Greg Reyna wrote:
> Learning Python (on a Mac), with the massive help of Mark Lutz's
> excellent book, "Learning Python".
>
> What I want to do is this:
> I've got a Class Object that begins with a def. It's designed to be
> fed a string that looks like this:
