[ZPT] structure usage question

[Lynn Ranen]

hi -- i'm trying to do this

<a href="$url_query_string"> something else goes here </a>
    where $url_query_string = GET string calling cgi function


After some hoop-jumping, I have this:
  <a tal:attributes="href python:'Reports.py?doit&task_id=%s' %(taskid)">
foo </a>

The problem is that the ampersand is being escaped.  The docs say the
"structure" keyword will prevent this, but I have been unable to get the
"structure" working in:

-- attributes statement
-- global variable definition statement
-- local  variable definition statement


The GET works with the escaped ampersand, but I don't understand the need to
have keywords that only work under such restricted circumstances.

Thansk --lynn