[Zope] Quoting HTML

[beno]

Hi;
I have the following Python Script (*not* External Script):

import string

size = string.atoi(size)/1280
css = "<style type='text/css'>"
css += ".headline { position: absolute; top: " + str(100*size) + "; left: " 
+ str(150*size) + "; font-style: 800 " + str(40*size) + "px futura }"
css += ".belowHeadline { position: absolute; top: " + str(150*size) + "; 
left: " + str(250*size) + "; font-style: italic " + str(25*size) + "px 
verdana }"
css += "</style>"
return css


It isn't rendering properly because the brackets are being translated into 
ASCII. How do I prevent this?
TIA,
beno