code: def test_edge_lookup(self):
      G = self.Graph()
      G.add_edge(1, 2, foo="bar")
      G.add_edge(1, 2, "key", foo="biz")
      assert edges_equal(G.edges[1, 2, 0], {"foo": "bar"})
      assert edges_equal(G.edges[1, 2, "key"], {"foo": "biz"})
  
imports: from collections import UserDict
  import pytest
  import networkx
  from networkx.utils import edges_equal
  from .test_graph import BaseAttrGraphTester
  from .test_graph import TestGraph
label_desc: Use image node_id 12 for calling the BaseMultiGraphTester obj's underlying member method code with example usage: obj.test_edge_lookup() without return types