[Zope] how to understand traceback

[prabuddha ray]

Hi se'nor deiter,

       This was new for me.
Looking at the traceback from error cudnt make out anything.

The long listing given below. kindly tell me wat do u infer

Traceback (innermost last):
   Module ZPublisher.Publish, line 101, in publish
   Module ZPublisher.mapply, line 88, in mapply
   Module ZPublisher.Publish, line 39, in call_object
   Module Shared.DC.Scripts.Bindings, line 306, in __call__
   Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec
   Module Products.PageTemplates.ZopePageTemplate, line 222, in 
_exec
   Module Products.PageTemplates.PageTemplate, line 96, in 
pt_render
    - <ZopePageTemplate at /store_nic/consumables/index_html>
   Module TAL.TALInterpreter, line 190, in __call__
   Module TAL.TALInterpreter, line 234, in interpret
   Module TAL.TALInterpreter, line 611, in do_loop_tal
   Module Products.PageTemplates.TALES, line 206, in setRepeat
   Module Products.PageTemplates.TALES, line 221, in evaluate
    - URL: /store_nic/consumables/index_html
    - Line 85, Column 0
    - Expression: <PythonExpr 
context.getDistrictUser(distname=request.form['districtname'])>
    - Names:
       {'container': <OrderedFolder instance at 41990a10>,
        'context': <OrderedFolder instance at 41990a10>,
        'default': <Products.PageTemplates.TALES.Default instance 
at 0x40c78c6c>,
        'here': <OrderedFolder instance at 41990a10>,
        'loop': <SafeMapping instance at 4073cd40>,
        'modules': 
<Products.PageTemplates.ZRPythonExpr._SecureModuleImporter 
instance at 0x40c7828c>,
        'nothing': None,
        'options': {'args': ()},
        'repeat': <SafeMapping instance at 4073cd40>,
        'request': <HTTPRequest, 
URL=http://localhost:8080/store_nic/consumables/index_html>,
        'root': <Application instance at 41870920>,
        'template': <ZopePageTemplate at 
/store_nic/consumables/index_html>,
        'traverse_subpath': [],
        'user': nic}
   Module Products.PageTemplates.ZRPythonExpr, line 47, in 
__call__
    - __traceback_info__: 
context.getDistrictUser(distname=request.form['districtname'])
   Module Python expression 
"context.getDistrictUser(distname=request.form['districtname'])", 
line 1, in <expression>
   Module AccessControl.ZopeGuards, line 67, in guarded_getitem
KeyError: 'districtname'




On Sat, 12 Mar 2005 Dieter Maurer wrote :
>prabuddha  ray wrote at 2005-3-11 10:17 -0000:
> >Ya u got me this time abzlutli but i'm jus not getting it.
> >looks like there is something else.
> >the define code dint work.i'm still getting the same error.
> >
> >  Error Type
> >KeyError
> >Error Value
> >'districtname'
>
>You must learn to look at the traceback!
>
>You find it in the ZMI's "Root Folder" --> "error_log".
>--
>Dieter