docs: def get_energy_tersoff(structure, gulp_cmd='gulp'):
      """
      Compute the energy of a structure using Tersoff potential.
  
      Args:
          structure: pymatgen.core.structure.Structure
          gulp_cmd: GULP command if not in standard place
      """
      gio = GulpIO()
      gc = GulpCaller(gulp_cmd)
      gin = gio.tersoff_input(structure)
      gout = gc.run(gin)
      return gio.get_energy(gout)