code: def test_empty_scipy(self):
      G = nx.Graph()
      assert _pagerank_scipy(G) == {}
  
imports: import random
  import pytest
  import networkx
  from networkx.classes.tests import dispatch_interface
  from networkx.algorithms.link_analysis.pagerank_alg import _pagerank_numpy, _pagerank_python, _pagerank_scipy
label_desc: Use image node_id 4 for calling the TestPageRankScipy obj's underlying member method code with example usage: obj.test_empty_scipy() without return types