如何在matplotlib中用括号标注直方图

import matplotlib.pyplot as plt
import numpy as np

# 创建一些数据
data = np.random.normal(0, 1, 1000)

# 绘制直方图
fig, ax = plt.subplots()
n, bins, patches = ax.hist(data, bins=30, alpha=0.75)

# 添加括号标注
for i in range(len(patches)):
    x = patches[i].get_x() + patches[i].get_width() / 2
    y = patches[i].get_height()
    ax.annotate('(', xy=(x, y), xytext=(x, y + 0.5),
                ha='center', va='bottom', fontsize=12, color='red')
    ax.annotate(')', xy=(x, y), xytext=(x, y - 1),
                ha='center', va='top', fontsize=12, color='red')

# 显示图形
plt.show()