code: def test_robust_skewness_1d_2d(self, reset_randomstate):
      x = np.random.randn(21)
      y = x[:, None]
      sk_x = robust_skewness(x)
      sk_y = robust_skewness(y, axis=None)
      assert_almost_equal(np.array(sk_x), np.array(sk_y))
  
imports: import numpy
  import pandas
  from numpy.testing import assert_almost_equal, assert_raises, assert_equal, assert_allclose
  from statsmodels.stats._adnorm import normal_ad
  from statsmodels.stats.stattools import omni_normtest, jarque_bera, durbin_watson, _medcouple_1d, medcouple, robust_kurtosis, robust_skewness
label_desc: Use image node_id 13 for calling the TestStattools obj's underlying member method code with example usage: obj.test_robust_skewness_1d_2d(reset_randomstate) without return types