1cdef class Base: 2 cpdef str noargs(self) 3 cpdef str int_arg(self, int i) 4 cpdef str _class(tp) 5 6cdef class Derived(Base): 7 cpdef str noargs(self) 8 cpdef str int_arg(self, int i) 9 cpdef str _class(tp) 10 11cdef class DerivedDerived(Derived): 12 cpdef str noargs(self) 13 cpdef str int_arg(self, int i) 14 cpdef str _class(tp) 15 16cdef class Derived2(Base): 17 cpdef str noargs(self) 18 cpdef str int_arg(self, int i) 19 cpdef str _class(tp) 20