code: def setup_class(cls):
      global np
      np = pytest.importorskip("numpy")
  
imports: import random
  from copy import copy
  import pytest
  import networkx
  from networkx.utils import PythonRandomInterface, arbitrary_element, create_py_random_state, create_random_state, dict_to_numpy_array, discrete_sequence, flatten, groups, make_list_of_ints, pairwise, powerlaw_sequence
  from networkx.utils.misc import _dict_to_numpy_array1, _dict_to_numpy_array2
label_desc: Use image node_id 1 for calling the TestNumpyArray obj's underlying member method code with example usage: obj.setup_class(cls) without return types