如何在python中绘制频率表？

import matplotlib.pyplot as plt

def plot_frequency_table(data):
    # 统计频率
    frequency_table = {}
    for item in data:
        if item in frequency_table:
            frequency_table[item] += 1
        else:
            frequency_table[item] = 1
    
    # 提取键和值
    items = list(frequency_table.keys())
    counts = list(frequency_table.values())
    
    # 绘制频率表
    plt.bar(items, counts)
    plt.xlabel('元素')
    plt.ylabel('频率')
    plt.title('频率表')
    plt.show()

# 示例数据
data = [1, 2, 3, 2, 1, 3, 3, 4, 5, 4, 3, 2, 1]

# 绘制频率表
plot_frequency_table(data)