code: def test_import_vispy():
      """Importing vispy should only pull in other vispy.util submodule."""
      modnames = loaded_vispy_modules("vispy", 2)
      assert_equal(modnames, set(_min_modules))
  
file_path: vispy/vispy/util/tests/test_import.py
imports: import sys
  import os
  from vispy.testing import assert_in, assert_not_in, requires_pyopengl, run_tests_if_main, assert_equal
  from vispy.util import run_subprocess
  import vispy
label_desc: Use image node_id 3 for calling a global function with example usage: test_import_vispy() without return types