code: def test_remove_edge(self):
      G = self.G()
      G.add_nodes_from(
          [1, 2, 3, "A", "B", "C", "D", "E", "F", "G", "H"]
      )
  
      G.add_edges_from(zip(list("MNOP"), list("NOPM")))
      assert G.has_edge("O", "P")
      assert G.has_edge("P", "M")
      G.remove_node("P")  # tests remove_node()'s handling of edges.
      assert not G.has_edge("P", "M")
      pytest.raises(TypeError, G.remove_edge, "M")
  
      G.add_edge("N", "M")
      assert G.has_edge("M", "N")
      G.remove_edge("M", "N")
      assert not G.has_edge("M", "N")
  
      # self loop fails silently
      G.remove_edges_from(
          [list("HI"), list("DF"), tuple("KK"), tuple("JK")]
      )
      assert not G.has_edge("H", "I")
      assert not G.has_edge("J", "K")
      G.remove_edges_from([list("IJ"), list("KK"), list("JK")])
      assert not G.has_edge("I", "J")
      G.remove_nodes_from(set("ZEFHIMNO"))
      G.add_edge("J", "K")
  
imports: import pytest
  import networkx
  from networkx import convert_node_labels_to_integers
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 18 for calling the HistoricalTests obj's underlying member method code with example usage: obj.test_remove_edge() without return types