code: def test_project_multigraph(self):
      G = nx.Graph()
      G.add_edge("a", 1)
      G.add_edge("b", 1)
      G.add_edge("a", 2)
      G.add_edge("b", 2)
      P = bipartite.projected_graph(G, "ab")
      assert edges_equal(list(P.edges()), [("a", "b")])
      P = bipartite.weighted_projected_graph(G, "ab")
      assert edges_equal(list(P.edges()), [("a", "b")])
      P = bipartite.projected_graph(G, "ab", multigraph=True)
      assert edges_equal(list(P.edges()), [("a", "b"), ("a", "b")])
  
imports: import pytest
  import networkx
  from networkx.algorithms import bipartite
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 9 for calling the TestBipartiteProject obj's underlying member method code with example usage: obj.test_project_multigraph() without return types