human
Here's a good function header given the following:
I wrote the below code

    class x:
        pass
    inst = type(x())
    global cmpCalled
    cmpCalled = False
    class C:
        def __init__(self, value):
            self.value = value
        def __cmp__(self, other):
            global cmpCalled
            cmpCalled = True
            return (self.value - other.value)
    class D:
        def __init__(self, value):
            self.value = value
        def __cmp__(self, other):
            global cmpCalled
            cmpCalled = True
            return (self.value - other.value)
    class C2(C, ):
        pass
    class D2(D, ):
        pass
    AreEqual(inst.__eq__(C(3.0), C(4.5)), NotImplemented)
    AreEqual(inst.__eq__(C(3.0), C2(4.5)), NotImplemented)
    AreEqual(inst.__eq__(C(3.0), D(4.5)), NotImplemented)
    AreEqual(cmpCalled, False)

What's a good function header?
assistant
#Here's a good function header.

def test_oldstyle_eq():