code: def setup_function():
      gc.collect()
  
imports: import gc
  import pytest
  import random
  import networkx
  import numpy
  import cupy
  import cudf
  import cugraph
  from cugraph.datasets import karate_disjoint
  from cugraph.testing import utils, SMALL_DATASETS
label_desc: Use image node_id 1 for calling a global function with example usage: setup_function() without return types