[Zope] Sorting a custom-built list with dtml-in

[Tino Wildenhain]

Hi Robert,

Robert Jean wrote:
> Hello,
> 
> I have a DTML method that iterates over a list built
> by a Python script with the <dtml-in> tag. I want to
> be able to sort the list (with the attribute
> sort=sortColumn in the dtml-in tag). I have a few
> questions on this topic:
> 
> 1) I assume that the dtml-in tag does not know how to
> sort a list of dictionaries having the same keys. It
> only knows how to sort Python class instances. Is it
> correct?
> 
> 2) If I have to store Python class instances in my
> list, what feature must the class have? Does it have
> to inherit from Acquisition.Implicit, and / or
> Record.Record?
> 
> 3) Do I miss something else on this topic?
> 
> Thanks for your help,
> Robert

 From what I know, DTML in happyly sorts on lists
of dictionaries.
If you are using a python script to generate the
list, you can easy do the sorting there also.

See 
http://zope.org/Documentation/Books/ZopeBook/2_6Edition/AppendixB.stx/view

module "sequence"

You dont have to import it into python script, its already
available. Just use it like this:

return 
sequence.sort(yoursequence,[('key','cmp','asc'),('otherkey','cmp','asc')])

see the documentation for hints on sorting. There are a lot of
options.

This also helps when you finally skip DTML and use ZPT.

Regards
Tino