[Zope] equivalent of "missing=" in Python Script?

[Harris Peter]

Hi
I'm trying to do something in what is maybe a stupid way, but it sort of
works.
I am localising my application for different languages by using:

<dtml-var some-variable missing="Default english text">

If there's a folder on the acquisition path containing "some-variable" as a
DTML document or a property, you get the translation, otherwise you get the
English text.

Like I said, maybe a stupid way but it works. The alternative is support N
different translated versions of the whole application, which is a lot more
work, even though N == 2 at the moment.

The problem I am having is all the pages that have <dtml-var title_or_id> in
the
standard_html_header always show the (English) document title of course.

I want to write a Python script local_title to check if the current document
has a
property (say, title_property). I want to use the value as the name of a
variable
that will contain the localised title (if it's not missing). If there is no
title_property, or it doesn't contain the name of a variable that exists,
the
script should just return title_or_id as before.

So, 3 questions really:
1) Does anyone have a better idea for how to do this?
2) How do you get the value of a property on the current document?
3) How do you check if a variable is missing?

Thanks
Peter Harris


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