code: def test_lookfor():
      out = StringIO()
      utils.lookfor(
          "eigenvalue", module="numpy", output=out, import_modules=False
      )
      out = out.getvalue()
      assert_("numpy.linalg.eig" in out)
  
imports: import inspect
  import sys
  import pytest
  import numpy
  from numpy.core import arange
  from numpy.testing import assert_, assert_equal, assert_raises_regex
  from numpy.lib import deprecate, deprecate_with_doc
  import numpy.lib.utils
  from io import StringIO
label_desc: Use image node_id 1 for calling a global function with example usage: test_lookfor() without return types