[Zope3-Users] Dynamic __providedBy__

Martin Aspeli optilude at gmx.net
Thu Feb 14 18:22:46 EST 2008


I may have a use case where I need an instance to provide marker
interfaces dynamically. That is, under certain conditions I want the
type to say it provides a particular marker interface, and otherwise it
doesn't. It still needs to support the usual by-class and
directly-provided idioms for providing interfaces, including

Is such a thing possible? Perhaps one could make __providedBy__ a
dynamic property or something? Or is this a very bad idea?  :)


Author of `Professional Plone Development`, a book for developers who
want to work with Plone. See http://martinaspeli.net/plone-book

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