[triangle-zpug] static list in python

Josh Johnson josh_johnson at unc.edu
Fri Mar 14 18:05:08 UTC 2008


I agree, but there is the style guide and "convention" which I have a 
hard time ignoring. I know the language is flexible and programmers are 
free to do what works best for them, but conventions, if their sane and 
logical language-wise, are very good things. And most of them aren't 
really apparent to people who haven't sought them out.

I think your example might be a bit flawed, from what I understand there 
are specific consequences to using underscores in names (I'm looking at 
the style guide... I don't know from first hand experience).

But I know what you mean. Maybe a better example would be the convention 
that "constants" are named in upper case? It's definitely an idiom 
(python doesn't have constants in the C sense)... but then again, even 
though variable naming is a matter of preference, there is a (weekly) 
established convention.

Maybe "definitive" wasn't such a good word? :) I think I meant it in the 
sense of "complete" as opposed to "canonical" ...."well thought out" 
instead of "final"...

JJ

Philip Semanchuk wrote:
> On Mar 14, 2008, at 12:39 PM, Josh Johnson wrote:
>
>   
>> I guess a global isn't so bad, it's only really global to your  
>> package.
>>     
>
> I agree; that's the rationalization I use for using globals as  
> statics. =)
>
>   
>> There has to be some definitive answer.
>>     
>
> I don't mean to be argumentative, but I'm not sure there is. Some  
> features clearly defined in other languages become a matter of idiom  
> in Python. Idiom is often a matter of taste, and therefore not  
> definitive. A good example is the use of _foo and __foo as rough  
> analogs to "protected" and "private" in classes. Some people think it  
> is a bad idea, some like it, some (like Yours Truly) don't apply it  
> as consistently as they might. In that example there's no definitive  
> answer despite a lot of discussion on the topic.
>
> Just a different perspective.
>
> Cheers
> P
>
>
>   
>> Joseph Mack NA3T wrote:
>>     
>>> On Fri, 14 Mar 2008, Josh Johnson wrote:
>>>
>>>       
>>>> I recall two meanings for static in programming. Static can mean a
>>>> persistent value, like an internal counter in a list (I think that's
>>>> what you want),
>>>>         
>>> yes
>>>
>>>       
>>>> but I've also heard the term mean "a class method that
>>>> is accessed like a library instead of an instance method".
>>>>         
>>> sorry, forgot about this (I guess "static" is overloaded).
>>>
>>>       
>>>> I'm not sure if python supports the sort of persistent variable I  
>>>> think
>>>> you want (anybody else know?). If not, you may have to start with  
>>>> a list
>>>> and have that list be returned by your function and then  
>>>> subsequently
>>>> passed to it again:
>>>>         
>>> This doesn't seem a whole lot different to just having l being  
>>> global,
>>> which is what I'm doing for the moment.
>>>
>>> Thanks Joe
>>>
>>>       
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