cython

1
cdef class B(A):
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  cpdef foo(self):
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    """
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    >>> B().foo()
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    B
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    """
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    print "B"
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9
cdef class A(object):
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  cpdef foo(self):
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    """
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    >>> A().foo()
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    A
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    """
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    print "A"
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cdef class C(A):
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  cpdef foo(self):
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    """
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    >>> C().foo()
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    C
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    """
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    print "C"
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