1cdef class A:
2    def numerator(self):
3        return self
4
5cdef int  bitsize(A a):
6    return 1
7
8coeffs = [A()]
9
10class B:
11    """
12    >>> B().coeffs_bitsize()
13    [2]
14    """
15    def coeffs_bitsize(self):
16        r = [bitsize(c.numerator())+1 for c in coeffs]
17        return r
18