code: def generate_covalent_bond_graph(covalent_bonds):
      
      bond_graph=networkx.Graph()
      for inter in covalent_bonds:
          bond_graph.add_edge(inter.a, inter.b)
      return bond_graph
docs: Generates a graph of the covalent bond network described by the interactions.
  
      Parameters
      ----------
      covalent_bonds: [CovalentBond]
          List of `CovalentBond`.
  
      Returns
      -------
      bond_graph: networkx.Graph
          A graph of the covalent bond network.