1cdef double f(const double a, const double b, const double c): 2 return a + b - c 3 4def test_non_const_as_const_arg(): 5 """ 6 >>> test_non_const_as_const_arg() 7 1.0 8 """ 9 cdef double a = 1., b = 1., c = 1. 10 return f(a, b, c) 11