"""Illustrate the figure and axes enter and leave events by changing theframe colors on enter and leave"""importmatplotlib.pyplotaspltdefenter_axes(event):print('enter_axes',event.inaxes)event.inaxes.patch.set_facecolor('yellow')event.canvas.draw()defleave_axes(event):print('leave_axes',event.inaxes)event.inaxes.patch.set_facecolor('white')event.canvas.draw()defenter_figure(event):print('enter_figure',event.canvas.figure)event.canvas.figure.patch.set_facecolor('red')event.canvas.draw()defleave_figure(event):print('leave_figure',event.canvas.figure)event.canvas.figure.patch.set_facecolor('grey')event.canvas.draw()fig,ax=plt.subplots()fig.suptitle('mouse hover over figure or axes to trigger events')ax.set_label('Level 0')foriinrange(4):ax=ax.inset_axes([0.2,0.2,0.6,0.6])ax.set_label(f'Level{i+1}')fig.canvas.mpl_connect('figure_enter_event',enter_figure)fig.canvas.mpl_connect('figure_leave_event',leave_figure)fig.canvas.mpl_connect('axes_enter_event',enter_axes)fig.canvas.mpl_connect('axes_leave_event',leave_axes)plt.show()

frommatplotlibimportpyplotaspltdefon_motion(event):inaxes=event.inaxes# Depends on the actual inaxes semantics, of course.foraxinaxs:ax.patch.set_facecolor("w")ifinaxes:inaxes.patch.set_facecolor("y")event.canvas.draw()# Could draw only if a change was actually made.axs= []fig,ax=plt.subplots()ax.set_label('Level 0')axs.append(ax)foriinrange(4):ax=ax.inset_axes([0.2,0.2,0.6,0.6])ax.set_label(f'Level{i+1}')axs.append(ax)fig.canvas.mpl_connect('motion_notify_event',on_motion)plt.show()