python中2 y轴的图例问题

import matplotlib.pyplot as plt

# 创建图表对象
fig, ax1 = plt.subplots()

# 绘制第一个y轴的数据
x = [1, 2, 3, 4, 5]
y1 = [10, 20, 15, 25, 30]
ax1.plot(x, y1, 'r-', label='Data 1')
ax1.set_xlabel('X')
ax1.set_ylabel('Y1')

# 创建第二个y轴
ax2 = ax1.twinx()

# 绘制第二个y轴的数据
y2 = [50, 40, 30, 20, 10]
ax2.plot(x, y2, 'b-', label='Data 2')
ax2.set_ylabel('Y2')

# 添加图例
lines, labels = ax1.get_legend_handles_labels()
lines2, labels2 = ax2.get_legend_handles_labels()
ax2.legend(lines + lines2, labels + labels2, loc='upper right')

# 显示图表
plt.show()