code: def test_dir_testing():
      """Assert that output of dir has only one "testing/tester"
      attribute without duplicate"""
      assert len(dir(scipy)) == len(set(dir(scipy)))
  
file_path: scipy/scipy/_lib/tests/test_public_api.py
imports: import pkgutil
  import types
  import importlib
  import warnings
  from importlib import import_module
  import pytest
  import scipy
  from scipy.conftest import xp_available_backends
label_desc: Use image node_id 1 for calling a global function with example usage: test_dir_testing() without return types