Method __array_ufunc__

numpy/core/tests/test_umath.py:3274–3276

(self, func, method, *inputs, **kwargs)

                self.count = 0

            def __array_ufunc__(self, func, method, *inputs, **kwargs):
                self.count += 1
                return NotImplemented

        class CSub(C):
            def __array_ufunc__(self, func, method, *inputs, **kwargs):