Garito wrote at 2006-10-18 16:15 +0200: > ... >How can I control the way an attribute of a product is readed? >__getattr__? __getattribute__?
A "product" is an extension mechanism for Zope. Usually, a "product" does not have attributes (you are interested in). But inside your product you may have defined classes instances of which you place into the Zope hierarchy (<http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html> speaks about site building objects). The standard Python way to access their attributes ("__getattr__" and "__getattribute__") will work but has caveats: It is *very* easy to create infinite loops with it and their "self" with not be acquisition wrapped. The Zope specific safer way is to implement "__bobo_traverse__". Both the publisher as well as "[un]restrictedTraverse" (which is internally used by TALES path expressions) use "__bobo_traverse__" when defined. However, Python's "getattr" will not use it. -- Dieter _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )