Hi Gary, This question is more suited to zope@zope.org instead of zope-dev@zope.org, and you should not send html e-mail to any of these two lists, but since we are here... On Wed, 2002-03-13 at 16:13, Gary Yee wrote:

Hello,

I am very new to Zope/DTML and I am a little confused with the operation of the DTML-IN statement. Here is the snippet of code

<table border=1 width=100%> <dtml-in expr="( ((1), (1,2),(4,5,6),(7,8,9)) )"> <tr> <td><dtml-var sequence-item></td> </tr> </dtml-in> </table>

This code displays the contents 4 cells in a table and the output is 1 2 (4,5,6) (7,8,9)

I am a litte confused because I thought it would display the contents of the list as (1) (1,2) (4,5,6) (7,8,9)

I believe this is related to something I read about tuples of ( key, value) will handled with sequence-key and sequence-item ????

That's exactly what's happening. It's a misfeature in my opinion, but it makes it easy to iterate thru a dictionary .items() and a folder .objectItems().

I must be traversing the list incorrectly.....

No, you're not, the feature is wrong :-)

can anyone give me an example of how to traverse this list of tuples correctly.

The workaround is to make each tuple of your sequence the second elemento of a 2-tuple, as in '((1, (1,)), (2, (1, 2)), (3, (4, 5, 6)), (4, (4, 5, 6)))' Kind of like that old joke were the paranoid statician would take a bomb with himself to the plane because the odds of there being two bombs on a plane were so low... -- Ideas don't stay in some minds very long because they don't like solitary confinement.