I have the exact same problem and have been unable to find a solution
anywhere. Were you ever able to resolve this? 

sfmcfar wrote:
> I apologize for cross-posting from the plone newsgroup. but after posting
> this I realized that this was more of a Zope issue than a Plone one.  I
> wish I could cut-and-paste (development is on the other side of a
> firewall), so instead I'll be as clear as I can.  
> Anyway, I have a Plone product that contains a method called
> getFeedSequence() that returns the result (a dictionary) from
> feedparser.parse() (Feedparser is the generic RSS/Atom parser).  
> In my template, I can do:
> <div tal:define="myFeed python:getFeedSequence()">
>   <div tal:content="python:myFeed">
> And see the string representation of the dictionary with no problem.  But
> if
> I try and access a member of the sequence:
> <div tal:define="myFeed python:getFeedSequence()">
>   <div tal:content="python:myFeed['feed']['title']">
> VerboseSecurity reports "The container has no security assertions.
> Access to None of {[the entire RSS dictionary goes here]} denied."
> How can I have permission to access the entire sequence but not a
> portion of it?  it appears to me that the sequence is fairly
> straightforward - a few nested dictionaries, but that's it.  Does this
> make any sense?
> Thanks,
> Stan 

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