如何使用按钮在matplotlib中的两个不同图形之间切换

import matplotlib.pyplot as plt
from matplotlib.widgets import Button

fig, ax1 = plt.subplots()
ax1.plot([1, 2, 3], [4, 5, 6], 'r-', label='Line 1')
ax1.set_xlabel('X')
ax1.set_ylabel('Y')
ax1.set_title('Graph 1')
ax1.legend()

fig, ax2 = plt.subplots()
ax2.bar(['A', 'B', 'C'], [7, 8, 9], label='Bar 1')
ax2.set_xlabel('Category')
ax2.set_ylabel('Value')
ax2.set_title('Graph 2')
ax2.legend()

def switch_graph(event):
    if event.inaxes == ax1:
        ax2.set_visible(True)
        ax1.set_visible(False)
        fig.canvas.draw()
    elif event.inaxes == ax2:
        ax1.set_visible(True)
        ax2.set_visible(False)
        fig.canvas.draw()

ax_switch = plt.axes([0.7, 0.05, 0.1, 0.075])
btn_switch = Button(ax_switch, 'Switch')
btn_switch.on_clicked(switch_graph)

plt.show()