def test_coefficients(self):
        with warnings.catch_warnings():
            warnings.simplefilter('ignore', UserWarning)
            # 3rd order in n**(1/2)
            ne3 = ExpandedNormal([0., 1., 1.])
            assert_allclose(ne3._coef, [1., 0., 0., 1./6])

            # 4th order in n**(1/2)
            ne4 = ExpandedNormal([0., 1., 1., 1.])
            assert_allclose(ne4._coef, [1., 0., 0., 1./6, 1./24, 0., 1./72])

            # 5th order
            ne5 = ExpandedNormal([0., 1., 1., 1., 1.])
            assert_allclose(ne5._coef, [1., 0., 0., 1./6, 1./24, 1./120,
                    1./72, 144/1., 0., 1./1296])

            # adding trailing zeroes increases the order
            ne33 = ExpandedNormal([0., 1., 1., 0.])
            assert_allclose(ne33._coef, [1., 0., 0., 1./6, 0., 0., 1./72])
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/distributions/tests/test_edgeworth.py/TestExpandedNormal.test_coefficients/swapped operands of `/`