This is a pre-production deployment of Warehouse, however changes made here WILL affect the production instance of PyPI.
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Project Description
Class to automate delegation decisions based on inheritance graph.

Copyright 2004, Robert Dick (

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

For examples of use, please see the 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):

class MyClass(Delegate, qt.QObject):
__metaclass__ = sip_meta_join

Please see the license file for legal information.
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