如何在matplotlib中绘制有3列的饼图？

import matplotlib.pyplot as plt

labels = ['A', 'B', 'C']  # 饼图各部分的标签
sizes = [30, 40, 30]  # 饼图各部分的大小，总和为100
colors = ['red', 'green', 'blue']  # 饼图各部分的颜色

plt.pie(sizes, labels=labels, colors=colors, autopct='%1.1f%%')

plt.title('Pie Chart')
plt.legend(labels)

plt.show()

import matplotlib.pyplot as plt

labels = ['A', 'B', 'C']
sizes = [30, 40, 30]
colors = ['red', 'green', 'blue']

plt.pie(sizes, labels=labels, colors=colors, autopct='%1.1f%%')
plt.title('Pie Chart')
plt.legend(labels)
plt.show()