human
I wrote the below code

    global called
    clr.AddReference('IronPythonTest')
    import IronPythonTest.interop.net.type.clrtype as IPT
    from IronPython.Runtime.Types import PythonType
    for x in [IPT.Sanity, IPT.SanityGeneric[int], IPT.SanityGenericConstructor[PythonType], IPT.SanityDerived, IPT.SanityUniqueConstructor, IPT.SanityNoIPythonObject]:
        called = False
        class MyType(type, ):
            def __clrtype__(self):
                global called
                called = True
                return x
        class X(object, ):
            __metaclass__ = MyType
        AreEqual(called, True)
        if (x != IPT.SanityUniqueConstructor):
            temp = X()
            if (x == IPT.SanityNoIPythonObject):
                AreEqual(type(temp), x)
            else:
                AreEqual(type(temp), X)

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

def test_interesting_type_implementations():