code: def get_right_axes(self):
          "create, if needed, and return right-hand y axes"
          if len(self.fig.get_axes()) < 2:
              ax = self.axes.twinx()
  
          return self.fig.get_axes()[1f get_right_axes(self):
          "create, if needed, and return right-hand y axes"
          if len(self.fig.get_axes()) < 2:
              ax = self.axes.twinx()
  
          return self.fig.get_axes()[1]
docs: create, if needed, and return right-hand y axes