[Zope] reading File Objects from Python Scripts and External Methods

[Dennis Allison]

This relates to finding a workaround to my previous problem.  I can create 
File objects with content='text/xml' using essentially the same program I
was trying to use to write ParsedXML.

The next problem is how to read them, again from an External Method or
Python script, as a string.  The plan is to convert the XML back into the 
simple markup to allow for editing.  

Of course, I discovered that the XML renders to nothing when evaluated
using a <dtml-var .. >.  :-(