exit on key

PathPlanning/FrenetOptimalTrajectory/frenet_optimal_trajectory.py

@@ -347,6 +347,8 @@ def main():
 
         if show_animation:  # pragma: no cover
             plt.cla()
+            plt.gcf().canvas.mpl_connect('key_release_event',
+                    lambda event: [exit(0) if event.key == 'escape' else None])
             plt.plot(tx, ty)
             plt.plot(ob[:, 0], ob[:, 1], "xk")
             plt.plot(path.x[1:], path.y[1:], "-or")