我如何生成这个图表？

有没有一个库可以用来生成下面的图形？\n[图片链接](https://i.stack.imgur.com/hLOwI.png)\n我目前尝试的最接近的方法是生成两个独立的图形，然后将它们转换为numpy数组图像，然后将它们相加。但是我的解决方案中没有图例。\n

import cv2
import numpy as np
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(range(10),'b')
ax.set_xlabel('A')
ax.set_ylabel('B')
ax.yaxis.set_label_position("right")
ax.spines['bottom'].set_color('blue')
ax.spines['right'].set_color('blue')
ax.xaxis.label.set_color('blue')
ax.yaxis.label.set_color('blue')
ax.tick_params(axis='x', colors='blue')
ax.tick_params(axis='y', colors='blue')
ax.tick_params(right=True, left=False, top=False, labelleft=False, labelright=True)
fig.canvas.draw()
data = np.fromstring(fig.canvas.tostring_rgb(), dtype=np.uint8, sep='')
data = data.reshape(fig.canvas.get_width_height()[::-1] + (3,))
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(range(10),'r')
ax.set_xlabel('A')
ax.set_ylabel('B')
ax.xaxis.set_label_position("top")
ax.spines['top'].set_color('red')
ax.spines['left'].set_color('red')
ax.xaxis.label.set_color('red')
ax.yaxis.label.set_color('red')
ax.tick_params(axis='x', colors='red')
ax.tick_params(axis='y', colors='red')
ax.tick_params(left=True, right=False, bottom=False, top=True, labeltop=True, labelbottom=False)
fig.canvas.draw()
data = np.fromstring(fig.canvas.tostring_rgb(), dtype=np.uint8, sep='')
data = data.reshape(fig.canvas.get_width_height()[::-1] + (3,))

\n[图片链接](https://i.stack.imgur.com/hj6NG.png)\n[图片链接](https://i.stack.imgur.com/urIcK.png)