[Zope] ImageFile in a python product

I'm trying to publish images from my python product. I tried: image = ImageFile('www/myimage.gif', globals()) Does'nt work. I tried: def image(self): """ Return image """ return ImageFile('www/myimage.gif', globals()) Does'nt work either. I looked at the mailing list archives, with no clear response. How can I publish images from a python product class?