code: def test_pmf(self):
      poisson_pmf = poisson.pmf(2, 2)
      zipoisson_pmf = zipoisson.pmf(2, 2, 0.1)
      assert_allclose(poisson_pmf, zipoisson_pmf, rtol=5e-2, atol=5e-2)
  
imports: import numpy
  from numpy.testing import assert_allclose, assert_equal
  from scipy import stats
  from scipy.stats import poisson, nbinom
  from statsmodels.tools.tools import Bunch
  from statsmodels.distributions.discrete import genpoisson_p, truncatedpoisson, truncatednegbin, zipoisson, zinegbin, zigenpoisson, DiscretizedCount, DiscretizedModel
label_desc: Use image node_id 3 for calling the TestZIPoisson obj's underlying member method code with example usage: obj.test_pmf() without return types