code: def test_huber_scale(self):
      assert_almost_equal(scale.huber(self.chem)[0], 3.20549, DECIMAL)
  
imports: import numpy
  from numpy.random import standard_normal
  from numpy.testing import assert_almost_equal, assert_equal
  import pytest
  from scipy.stats import norm
  import statsmodels.api
  import statsmodels.robust.scale
  from statsmodels.robust.scale import mad
label_desc: Use image node_id 7 for calling the TestChem obj's underlying member method code with example usage: obj.test_huber_scale() without return types