code: def test_dir_testing():
      """Assert that output of dir has only one "testing/tester"
      attribute without duplicate"""
      assert len(dir(np)) == len(set(dir(np)))
  
imports: import sys
  import sysconfig
  import subprocess
  import pkgutil
  import types
  import importlib
  import inspect
  import warnings
  import numpy
  import numpy
  from numpy.testing import IS_WASM
  import pytest
label_desc: Use image node_id 4 for calling a global function with example usage: test_dir_testing() without return types