我按照kindall的建议玩弄了super（）。不幸的是，经过大量的努力，处理复杂的继承案例变得非常复杂。
经过一些工作，我意识到当通过MRO解析属性时，super（）直接访问类的__dict__（它不会进行getattr类型的调用）。解决方案是扩展一个ockock.MagicMock（）对象，并用一个类包装它以完成此操作。然后，可以将包装的类放在子类的__bases__变量中。
包装的对象将目标类的所有定义的属性反映到包装类的__dict__，以便super（）调用解析为内部MagicMock（）中正确修补的属性。
以下代码是到目前为止我发现可以使用的解决方案。请注意，我实际上是在上下文处理程序中实现的。另外，如果从其他模块导入，则必须注意修补适当的名称空间。
这是说明此方法的简单示例：
from mock import MagicMockimport inspectclass _WrappedMagicMock(MagicMock): def __init__(self, *args, **kwds): object.__setattr__(self, '_mockclass_wrapper', None) super(_WrappedMagicMock, self).__init__(*args, **kwds) def wrap(self, cls): # get defined attribtues of spec class that need to be preset base_attrs = dir(type('Dummy', (object,), {})) attrs = inspect.getmembers(self._spec_class) new_attrs = [a[0] for a in attrs if a[0] not in base_attrs] # pre set mocks for attributes in the target mock class for name in new_attrs: setattr(cls, name, getattr(self, name)) # eat up any attempts to initialize the target mock class setattr(cls, '__init__', lambda *args, **kwds: None) object.__setattr__(self, '_mockclass_wrapper', cls) def unwrap(self): object.__setattr__(self, '_mockclass_wrapper', None) def __setattr__(self, name, value): super(_WrappedMagicMock, self).__setattr__(name, value) # be sure to reflect to changes wrapper class if activated if self._mockclass_wrapper is not None: setattr(self._mockclass_wrapper, name, value) def _get_child_mock(self, **kwds): # when created children mocks need only be MagicMocks return MagicMock(**kwds)class A(object): x = 1 def __init__(self, value): self.value = value def get_value_direct(self): return self.value def get_value_indirect(self): return self.valueclass B(A): def __init__(self, value): super(B, self).__init__(value) def f(self): return 2 def get_value_direct(self): return A.get_value_direct(self) def get_value_indirect(self): return super(B, self).get_value_indirect()# nominal behaviorb = B(3)assert b.get_value_direct() == 3assert b.get_value_indirect() == 3assert b.f() == 2assert b.x == 1# using mock classMockClass = type('MockClassWrapper', (), {})mock = _WrappedMagicMock(A)mock.wrap(MockClass)# patch the mock inB.__bases__ = (MockClass, )A = MockClass# set values within the mockmock.x = 0mock.get_value_direct.return_value = 0mock.get_value_indirect.return_value = 0# mocked behaviorb = B(7)assert b.get_value_direct() == 0assert b.get_value_indirect() == 0assert b.f() == 2assert b.x == 0
