如何使用matplotlib制作包含多个数据的条形图

import matplotlib.pyplot as plt
import numpy as np

categories = ['A', 'B', 'C', 'D', 'E']  # x轴的分类
data1 = [10, 15, 7, 12, 9]  # 第一个数据集
data2 = [8, 11, 9, 6, 13]  # 第二个数据集

x = np.arange(len(categories))  # x轴的位置
width = 0.35  # 条形的宽度

fig, ax = plt.subplots()
rects1 = ax.bar(x - width/2, data1, width, label='Data 1')
rects2 = ax.bar(x + width/2, data2, width, label='Data 2')

ax.set_xlabel('Categories')
ax.set_ylabel('Values')
ax.set_title('Bar Chart with Multiple Data')
ax.set_xticks(x)
ax.set_xticklabels(categories)
ax.legend()

def autolabel(rects):
    for rect in rects:
        height = rect.get_height()
        ax.annotate('{}'.format(height),
                    xy=(rect.get_x() + rect.get_width() / 2, height),
                    xytext=(0, 3),
                    textcoords="offset points",
                    ha='center', va='bottom')

autolabel(rects1)
autolabel(rects2)

plt.show()