code: def test_multigraph(self, alg):
      G = nx.MultiGraph()
      G.add_edges_from(
          [(1, 2), (1, 2), (1, 2), (2, 3), (2, 3), ("3", 3), ("3", 3)]
      )
      answer = {
          1: 0.21066048614468322,
          2: 0.3395308825985378,
          3: 0.28933951385531687,
          "3": 0.16046911740146227,
      }
      p = alg(G)
      for n in G:
          assert p[n] == pytest.approx(answer[n], abs=1e-4)
  
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 13 for calling the TestPageRank obj's underlying member method code with example usage: obj.test_multigraph(alg) without return types