code: def test_interest_points_descriptor_only():
      np.random.seed(22)
      f = np.random.rand(256, 256) * 230
      f = f.astype(np.uint8)
      full = surf.surf(f, 6, 24, 1)
      only = surf.surf(f, 6, 24, 1, descriptor_only=True)
      assert full.size > only.size
  
file_path: mahotas/mahotas/tests/test_surf.py
imports: import numpy
  import mahotas
  import mahotas.features.surf
  from mahotas.features import _surf
  from .utils import luispedro_jpg
  import pytest
label_desc: Use image node_id 8 for calling a global function with example usage: test_interest_points_descriptor_only() without return types