Hi, both Resource and BrowserView have a common parent class, viz Location, whose parent class is object.
object | | Location / \ / \ / \ BrowserView Resource \ / \ / \ / FileResource As there are no calls to super() in any of the definitions of BrowserView, Reource, FileResource or Location, only the __init__ method of BrowserView would appear to be called because attribute lookup proceeds through the parent classes in the order they are provided in the definition. This can be practically tested by inserting a NotImplementedError into to the definition of Resource.__init__. I'm pretty certain that that method is never called, unless perhaps somewhere else in zope there is another class that inherits from it first. Cheers, John. --- Stephan Richter <[EMAIL PROTECTED]> wrote: > On Tuesday 19 September 2006 03:47, FB wrote: > > (Please correct me if I'm wrong, I'm not a Python > guru :-) ) > > > > Whenever you inherit from two classes, only the > first class' > > __init__ method is called implicitely on create of > a new instance. > > >>> class First(object): > ... def __init__(self): > ... print 'init 1-before' > ... super(First, self).__init__() > ... print 'init 1-after' > ... > >>> class Second(object): > ... def __init__(self): > ... print 'init 2-before' > ... super(Second, self).__init__() > ... print 'init 2-after' > ... > >>> class Join(First, Second): > ... def __init__(self): > ... print 'init 3-before' > ... super(Join, self).__init__() > ... print 'init 3-after' > ... > >>> Join() > init 3-before > init 1-before > init 2-before > init 2-after > init 1-after > init 3-after > <__main__.Join object at 0xb7b5fb6c> > >>> > > Regards, > Stephan > -- > Stephan Richter > CBU Physics & Chemistry (B.S.) / Tufts Physics > (Ph.D. student) > Web2k - Web Software Design, Development and > Training > _______________________________________________ > Zope3-users mailing list > Zope3email@example.com > http://mail.zope.org/mailman/listinfo/zope3-users > ___________________________________________________________ Yahoo! Photos NEW, now offering a quality print service from just 8p a photo http://uk.photos.yahoo.com _______________________________________________ Zope3-users mailing list Zope3firstname.lastname@example.org http://mail.zope.org/mailman/listinfo/zope3-users