code: def plot(self, joints, ax, target=None, show=False):
          
          from . import plot_utils
  
          if ax is None:
              # If ax is not given, create one
              ax = plot_utils.init_3d_figure()
          plot_utils.plot_chain(self, joints, ax)
          plot_utils.plot_basis(ax, self._length)
  
          # Plot the goal position
          if target is not None:
              plot_utils.plot_target(target, ax)
          if show:
              plot_utils.show_figure()
docs: Plots the Chain using Matplotlib
  
          Parameters
          ----------
          joints: list
              The list of the positions of each joint
          ax: matplotlib.axes.Axes
              A matplotlib axes
          target: numpy.array
              An optional target
          show: bool
              Display the axe. Defaults to False