Here's the situation: I have a dtml document with a list of questions under various headings, formatted like this: HEADING 1 question1 question2 question3 HEADING 2 question 4 question 5 I have a PythonScript that gives a list of only the questions to a Page Template: PythonScript called get_questions: data=container.data_document(None, None) # ignore blank lines # lines with no leading space are headings # lines with leading space are questions return [l for l in comps.splitlines() if l if l[0] is ' '] I'm rendering this using a page template: <td tal:repeat="question container/get_questions"> The problem is, I'm often (always?) getting no questions rendered. However, if I change the python script to this, it works every time. PythonScript called get_questions: data=container.data_document(None, None) # ignore blank lines # lines with no leading space are headings # lines with leading space are questions questions = [l for l in comps.splitlines() if l if l[0] is ' '] return questions Any ideas what might be happening? I think the compiled code of the python script might be incorrect when directly returning the results a comprehension. -- Steve Alexander Software Engineer Cat-Box limited