如何在Matplotlib中折叠饼图上方和轴标题下方的空间?

下面是一些与我实际操作类似的示例代码:

import matplotlib.pyplot as plt

x = ['a', 'b', 'c']
y = [1.1, 3.5, 2.2]
y1_sizes = y
y2_sizes = y

fig, axarr = plt.subplots(1, 2)
ax1 = axarr[0]
ax2 = axarr[1]

ax1.pie(y1_sizes, shadow=True, startangle=90, autopct='%1.1f%%')
ax1.axis('equal')
ax1.set_title('Old Stuff')

ax2.pie(y2_sizes, shadow=True, startangle=90, autopct='%1.1f%%')
ax2.axis('equal') 
ax2.set_title('New Stuff')

lgd1 = ax1.legend(x, loc='lower center')
lgd2 = ax2.legend(x, loc='lower center')

fig.suptitle('My Chart Title', fontweight='bold')

这就是结果