[Zope] Zope book

[Magnus Heino]

Hi

I can't get the makeThumbnail example at
http://www.zope.org/Members/michel/ZB/ScriptingZope.dtml to work.

Line 18, "original_file=StringIO(original_image.data)" gives this error

Error Type: TypeError
Error Value: expected string, ImplicitAcquirerWrapper found

Any clues?

/Magnus