[Zope3-Users] Weird behaviour of ViewPageTemplateFile()

[Martin J. Laubach]

   I just stumbled over something that utterly baffles me and hope
someone can point out the absolutely obvious to me.

   I've got a view defined in a configure.zcml that points to this  
class:

     class MyView(BrowserView):
         def __call__(self):
             self.pt = ViewPageTemplateFile('empty.pt')
             data = self.pt()
             return data

   That works fine. However, I don't really need pt as instance  
variable,
so I turned it into a local variable:

     class MyView(BrowserView):
         def __call__(self):
             pt = ViewPageTemplateFile('empty.pt')
             data = pt()
             return data

   And that version throws an exception:

     Traceback (innermost last):
       Module ZPublisher.Publish, line 119, in publish
       Module ZPublisher.mapply, line 88, in mapply
       Module ZPublisher.Publish, line 42, in call_object
       Module mjl.example.browser.myform, line 31, in __call__
       Module Shared.DC.Scripts.Bindings, line 313, in __call__
       Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
       Module Shared.DC.Scripts.Bindings, line 1, in ?
       Module Shared.DC.Scripts.Bindings, line 293, in  
_getTraverseSubpath
     AttributeError: 'str' object has no attribute 'other'


   Same if I just do the simpler "return ViewPageTemplateFile 
('empty.pt')()"
of course.

   I simply do not understand why, what or who does care how I name my
variables or where I put them? Please hit me hard with a cluebat. Twice.

   Cheers,

          mjl