preferring [] or () in list of error codes?

Charles Yeomans charles at
Tue Jun 9 03:56:53 CEST 2009

On Jun 8, 2009, at 9:28 PM, Carl Banks wrote:

> On Jun 8, 6:02 pm, Ben Finney <ben+pyt... at> wrote:
>> Carl Banks <pavlovevide... at> writes:
>>> If you want to go strictly by the book, I would say he ought to be
>>> using a set since his collection of numbers has no meaningful order
>>> nor does it make sense to list any item twice.
>> Yes, a set would be best for this specific situation.
>>> I don't think it's very important, however, to stick to rules like
>>> that for objects that don't live for more than a single line of  
>>> code.
>> It's important to the extent that it's important to express one's
>> *meaning*. Program code should be written primarily as a means of
>> communicating with other programmers, and only incidentally for the
>> computer to execute.
> Which is precisely why isn't not very important for an object that
> exists for one line.  No programmer is ever going to be confused about
> the meaning of this:
> if a in (1,2,3):

Actually, I might be -- I think of a tuple first as a single thing, as  
opposed to a list or map, which I see first as a collection of other  

Charles Yeomans

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