Matplotlib中圆角的条形图？

import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle

# 数据
categories = ['A', 'B', 'C', 'D', 'E']
values = [12, 15, 9, 20, 18]

# 创建图形和轴对象
fig, ax = plt.subplots()

# 绘制圆角条形图
bar_width = 0.6
for i, (category, value) in enumerate(zip(categories, values)):
    # 创建具有圆角的矩形（条形）
    bar = Rectangle((i - bar_width / 2, 0), bar_width, value, angle=0, facecolor='skyblue', edgecolor='black', lw=1,
                    capstyle='round')
    ax.add_patch(bar)

# 设置轴标签和标题
ax.set_xticks(range(len(categories)))
ax.set_xticklabels(categories)
ax.set_ylabel('Value')
ax.set_title('Rounded Bar Chart')

# 显示图形
plt.show()