[Zope] How does Zope and Python work?

[Chris McDonough]

Peter Bengtsson wrote:
> 
> Consider:
> 
> <dtml-in select_zsqlmethod_sql>
>    <dtml-var foo>
> </dtml-in>
> <dtml-in select_zsqlmethod_sql>
>    <dtml-var bar>
> </dtml-in>
> 
> 2 process calls to select_zsqlmethod_sql()

Yes.

> <dtml-let sequence=select_zsqlmethod_sql>
>   <dtml-in sequence>
>       <dtml-var foo>
>   </dtml-in>
>   <dtml-in sequence>
>      <dtml-var bar>
>   </dtml-in>
> </dtml-let>
> 
> 1 process call, isn't it??

Yes..
 
> Is it different for calls to other sequence returning things? like
> objectValues() or getResultScript() or whatever.

No...

> I just want to use garbage collection instead of to many calls to other
> objects around.

I'm not sure what garbage collection you're referring to, but making
calls to things that return sequences and storing their results in a
local variable (via dmtl-let) puts the sequence in memory for the
duration of the let.

-- 
Chris McDonough                    Zope Corporation
http://www.zope.org             http://www.zope.com
"Killing hundreds of birds with thousands of stones"