如何使matplotlib autopct成为标签名称的函数？

import matplotlib.pyplot as plt

def label_func(pct, labels):
    absolute = int(pct / 100. * np.sum(sizes))
    return "{:.1f}%\n({:d} g)".format(pct, absolute)

sizes = [15, 30, 45, 10]
labels = ['Frogs', 'Hogs', 'Dogs', 'Logs']

fig1, ax1 = plt.subplots()
ax1.pie(sizes, labels=labels, autopct=lambda pct: label_func(pct, labels))
ax1.axis('equal')
plt.show()