Is there a commas-in-between idiom?

[Peter van Kampen]

On 2006-11-08, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Wednesday 8/11/2006 16:51, Peter van Kampen wrote:
>
>>"""
>>A = B = [] # both names will point to the same list
>>"""
>>
>>I've been bitten by this once or twice in the past, but I have always
>>wondered what it was useful for? Can anybody enlighten me?
>
> As an optimization, inside a method, you can bind an instance 
> attribute and a local name to the same object:
>
>      def some_action(self):
>          self.items = items = []
>          // following many references to self.items,
>          // but using items instead.
>
> Names in the local namespace are resolved at compile time, so using 
> items is a lot faster than looking for "items" inside self's 
> namespace each time it's used.

Nice example.

Thanks,

PterK

-- 
Peter van Kampen
pterk -- at -- datatailors.com