绘制饼形图

import matplotlib.pyplot as plt
import numpy as np
plt.subplot(1,1,1)
labels = ["Frogs", "Hogs", "Dogs", "Logs"] # 定义标签
x = np.array([15, 30, 45, 10])
colors = ['yellowgreen', 'gold', 'lightskyblue', 'lightcoral']
explode = (0, 0.1, 0, 0)
labeldistance = 1.1
plt.pie(x, labels=labels, autopct='%1.1f%%', shadow=True, colors= colors, explode=explode, labeldistance=labeldistance)
plt.axis('equal')   #显示为圆（避免比例压缩为椭圆）
plt.show()