code: def plot_path(line, lattice=None, coords_are_cartesian=False, ax=None,
                **kwargs):
      
  
      ax, fig, plt = get_ax3d_fig_plt(ax)
  
      if "color" not in kwargs:
          kwargs["color"] = "r"
      if "linewidth" not in kwargs:
          kwargs["linewidth"] = 3
  
      for k in range(1, len(line)):
          vertex1 = line[k - 1]
          vertex2 = line[k]
          if not coords_are_cartesian:
              if lattice is None:
                  raise ValueError(
                      "coords_are_cartesian False requires the lattice")
              vertex1 = lattice.get_cartesian_coords(vertex1)
              vertex2 = lattice.get_cartesian_coords(vertex2)
          ax.plot(*zip(vertex1, vertex2), **kwargs)
  
      return fig, ax
docs: Adds a line passing through the coordinates listed in 'line' to a matplotlib Axes
  
      Args:
          line: list of coordinates.
          lattice: Lattice object used to convert from reciprocal to cartesian coordinates
          coords_are_cartesian: Set to True if you are providing
              coordinates in cartesian coordinates. Defaults to False.
              Requires lattice if False.
          ax: matplotlib :class:`Axes` or None if a new figure should be created.
          kwargs: kwargs passed to the matplotlib function 'plot'. Color defaults to red
              and linewidth to 3.
  
      Returns:
          matplotlib figure and matplotlib ax