Hi, I'm going to write an alternative implementation of zope.app.file.interfaces.IFile . This implementation will automatically determine the mime type of the data it's containing.
I would like to add a method that determines (guesses), if the current file object contains an image... isimage=(mimetype(self.data).split('/') == 'image') ... and I want to dynamically make the object implement another interface ... if isimage: IImage.provide(self) else: IImage.dontprovide(self) Unfortunately, there is no 'provide' method on interfaces :-( . Now the questions: 1. Is the list of a content object's provided interfaces stored persistently in the Zodb? 2. Is it according to Zope-, Python-, ... philosophy ok to danymically implement interfaces depending on the inner state of an object? 3. How do I manually make objects provide or "unprovide" given interfaces? Regards, Frank _______________________________________________ Zope3-users mailing list Zope3firstname.lastname@example.org http://mail.zope.org/mailman/listinfo/zope3-users