code: def test_dist1(self):
      self.dist1.rvs(size=10)
      self.dist1.pdf(np.linspace(-4, 4, 11))
  
file_path: statsmodels/statsmodels/sandbox/distributions/tests/test_norm_expan.py
imports: import pytest
  import numpy
  from scipy import stats
  from numpy.testing import assert_allclose, assert_array_less
  from statsmodels.sandbox.distributions.extras import NormExpan_gen
label_desc: Use image node_id 1 for calling the CheckDistribution obj's underlying member method code with example usage: obj.test_dist1() without return types