delegate Class to automate delegation decisions based on inheritance graph. Class to automate delegation decisions based on inheritance graph. Copyright 2004, Robert Dick (dickrp@ece.northwestern.edu). Whenever you need to delegate to something, inherit from delegate and use self.__<base>.<method()> to access the base. If the delegation was inappropriate due to reconverging paths in the inheritance graph, the return value will be None. In the case of reconverging paths, the left-most call in the method resolution order will be honored. The rest will be nulified. You can also check to see if the base is the no_delegation object. Delegate to all your bases if you need everything in the inheritance graph to be visited. As long as one of a class's (transitive) bases inherits from Delegate, that's enough. For examples of use, please see the delegate.py file. Python doesn't yet automate meta-class instantiation. If you need to inherit from Delegate and another class that does not have a 'type' metaclass, you'll need to generate a shared derived metaclass and explicitly use that as your class's metaclass. For example: import Delegate, qt class sip_meta_join(type(Delegate), type(qt.QObject)): def __init__(*args): type(Delegate).__init__(*args) type(qt.QObject).__init__(*args) class MyClass(Delegate, qt.QObject): __metaclass__ = sip_meta_join ... Please see the license at the end of the source code for legal information. http://ziyang.ece.northwestern.edu/~dickrp/python/delegate-0.1.tar.gz Robert Dick 39a78cca6c5c92d18d11f84adb1bf69196880386 0.1