code: def test_frozen_attributes():
      # gh-14827 reported that all frozen distributions had both pmf and pdf
      # attributes; continuous should have pdf and discrete should have pmf.
      message = "'rv_discrete_frozen' object has no attribute"
      with pytest.raises(AttributeError, match=message):
          stats.binom(10, 0.5).pdf
      with pytest.raises(AttributeError, match=message):
          stats.binom(10, 0.5).logpdf
      stats.binom.pdf = "herring"
      frozen_binom = stats.binom(10, 0.5)
      assert isinstance(frozen_binom, rv_discrete_frozen)
      delattr(stats.binom, "pdf")
  
imports: import numpy.testing
  from numpy.testing import assert_allclose
  import numpy
  import pytest
  from scipy import stats
  from .common_tests import check_normalization, check_moment, check_mean_expect, check_var_expect, check_skew_expect, check_kurt_expect, check_entropy, check_private_entropy, check_edge_support, check_named_args, check_random_state_property, check_pickling, check_rvs_broadcast, check_freezing
  from scipy.stats._distr_params import distdiscrete, invdistdiscrete
  from scipy.stats._distn_infrastructure import rv_discrete_frozen
label_desc: Use image node_id 17 for calling a global function with example usage: test_frozen_attributes() without return types