[Zope] how can I ask an object whether it is folderish?

[Chris Withers]

Andrew Kenneth Milton wrote:
> 
> if hasattr(object, isPrincipiaFolderish) and object.isPrincipiaFolderish:
>     print "object is Folderish."

...or, more neatly:

if getattr(object,'isPrincipiaFolderish',None):
   print "I'm folderish"