code: def test_number_of_edges(self):
      assert self.G.number_of_edges() == nx.number_of_edges(self.G)
      assert self.DG.number_of_edges() == nx.number_of_edges(self.DG)
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 7 for calling the TestFunction obj's underlying member method code with example usage: obj.test_number_of_edges() without return types