Alan Gauld wrote:
"Tim Golden" <[EMAIL PROTECTED]> wrote
In fact I guess you could say that the new definition of a list
comprehension is
[ generator expression]
Well, not if sure if you meant that literally
No I meant in syntactic terms.
I imagined that that was what you meant. I think
On 10/07/2008, Kent Johnson <[EMAIL PROTECTED]> wrote:
> On Wed, Jul 9, 2008 at 9:38 PM, John Fouhy <[EMAIL PROTECTED]> wrote:
> > Is the generator expression grammar right? How do I parse, e.g.,
> > '(x+1 for x in range(10))'? Seems like there's nothing there for
> > 'range(10)'. Like it shou
On Wed, Jul 9, 2008 at 9:38 PM, John Fouhy <[EMAIL PROTECTED]> wrote:
> On 10/07/2008, Kent Johnson <[EMAIL PROTECTED]> wrote:
>> The actual formal syntax definitions for the two are slightly different:
>> http://docs.python.org/ref/lists.html
>> http://docs.python.org/ref/genexpr.html
> Is the
On 10/07/2008, Kent Johnson <[EMAIL PROTECTED]> wrote:
> The actual formal syntax definitions for the two are slightly different:
> http://docs.python.org/ref/lists.html
> http://docs.python.org/ref/genexpr.html
>
> Presumably this means there is something that is syntactically allowed
> in on
On Wed, Jul 9, 2008 at 8:17 PM, Alan Gauld <[EMAIL PROTECTED]> wrote:
> No I meant in syntactic terms.
> We usually define an LC as
>
> [ expr for vars in sequence if expr ]
>
> or somesuch imprecise gobbledy gook ;-).
>
> Now we can define the generator expr (syntax) as
>
> expr for vars in
"Tim Golden" <[EMAIL PROTECTED]> wrote
In fact I guess you could say that the new definition of a list
comprehension is
[ generator expression]
Well, not if sure if you meant that literally
No I meant in syntactic terms.
We usually define an LC as
[ expr for vars in sequence if expr ]
o
Alan Gauld wrote:
In fact I guess you could say that the new definition of a list
comprehension is
[ generator expression]
Well, not if sure if you meant that literally, but
it's certainly not: that would be a list whose one
item was a generator expression:
squares = (x * x for x in range (1
"Don Jennings" <[EMAIL PROTECTED]> wrote
return ';'.join(x for x in l if x)
Ah! A list comprehension. Not at that point in the learning python
book,
Not quite, I believe its called a generator expression. Its like
a list comprehension but without the [] around it.
In fact I guess you coul
Ah! A list comprehension. Not at that point in the learning python book,
yet, but I will be soon. Thanks!
Don
On Tue, Jul 8, 2008 at 9:34 PM, Kent Johnson <[EMAIL PROTECTED]> wrote:
> On Tue, Jul 8, 2008 at 6:35 PM, Don Jennings <[EMAIL PROTECTED]> wrote:
>
> > def __unicode__(self):
> >
On 09/07/2008, bob gailer <[EMAIL PROTECTED]> wrote:
> or just [ x for x in LIST if x ]
or filter(None, LIST). But that's a bit obscure.
(fractionally faster, though, according to my brief experiment with timeit)
--
John.
___
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On Tue, Jul 8, 2008 at 6:35 PM, Don Jennings <[EMAIL PROTECTED]> wrote:
> def __unicode__(self):
> l=[self.first_name, self.last_name, self.email, self.phone]
> res=[]
>
> for x in l:
> if x != '':
> res.append(x)
>
> return ';'.join(
("Duh! Code would be good," says newbie to himself.)
Here's an example from django which I am using, but I asked on this list
since it seems more related to python than the web framework:
class Contact(models.Model):
first_name = models.CharField(max_length=30, blank=True)
last_name = mod
Monika Jisswel wrote:
list comprehention : [ x for x in LIST if x != '' ]
or just [ x for x in LIST if x ]
--
Bob Gailer
919-636-4239 Chapel Hill, NC
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list comprehention : [ x for x in LIST if x != '' ]
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On Tue, Jul 8, 2008 at 9:14 AM, Don Jennings <[EMAIL PROTECTED]> wrote:
> Hi, folks.
>
> From within a class, I want to return a string with data from non-empty
> variables in a class.
>
> I could create a list of all the variables and then iterate over them,
> dropping the ones which are empty, th
Hi, folks.
>From within a class, I want to return a string with data from non-empty
variables in a class.
I could create a list of all the variables and then iterate over them,
dropping the ones which are empty, then join() and return them; however, I
am guessing there is another way to get that
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