[Zope-CMF] parent id

[Fearless Froggie]

Hi,

Would anybody know how to get the id of the parent of
an object given the id of the child? IE, if I have the
id of a file, how would I get the id of the folder
it's in? 

No problem in finding what files are in a given
folder, going the other way is giving me some grief :)

Thanks, Rita.

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