1 __doc__ = u"""

2 >>> zoo = Zoo()

3 >>> for cl in (Zoo, Bam, Bar, Foo, Base, Base0): assert isinstance(zoo, cl)

4 >>> fooit(zoo)

5 42

6

7 >>> bam = Bam()

8 >>> for cl in (Bam, Bar, Foo, Base, Base0): assert isinstance(bam, cl)

9 >>> fooit(bam)

10 42

11

12 >>> bar = Bar()

13 >>> for cl in (Bar, Foo, Base, Base0): assert isinstance(bar, cl)

14 >>> fooit(bar)

15 42

16

17 >>> foo = Foo()

18 >>> for cl in (Foo, Base, Base0): assert isinstance(foo, cl)

19 >>> fooit(foo)

20 42

21

22 >>> base = Base()

23 >>> for cl in (Base, Base0): assert isinstance(base, cl)

24 >>> fooit(base)

25 Traceback (most recent call last):

26 TypeError: Argument 'foo' has incorrect type (expected subclasses.Foo, got subclasses.Base)

27

28 >>> base0 = Base0()

29 >>> for cl in (Base0,): assert isinstance(base0, cl)

30 >>> fooit(base0)

31 Traceback (most recent call last):

32 TypeError: Argument 'foo' has incorrect type (expected subclasses.Foo, got subclasses.Base0)

33 """

34

35 cdef class Base0:

36 pass

37

38 cdef class Base(Base0):

39 pass

40

41 cdef class Foo(Base):

42 cdef fooit(self):

43 return 42

44

45 cdef class Bar(Foo):

46 pass

47

48 cdef class Bam(Bar):

49 pass

50

51 cdef class Zoo(Bam):

52 pass

53

54

55 def fooit(Foo foo):

56 return foo.fooit()