如何在Python中选择并向markdown文件添加条目？

import markdown
import os

def add_item_to_markdown(file_path, item_title, item_content):
    # 读取Markdown文件内容
    with open(file_path, 'r', encoding='utf-8') as file:
        content = file.read()

    # 构造新的Markdown条目
    new_item = f"## {item_title}\n\n{item_content}\n\n"

    # 将新的条目添加到Markdown文件中
    with open(file_path, 'a', encoding='utf-8') as file:
        file.write(new_item)

    # 将Markdown文件转换为HTML文件
    html_content = markdown.markdown(content)

    # 保存转换后的HTML文件
    html_file_path = os.path.splitext(file_path)[0] + '.html'
    with open(html_file_path, 'w', encoding='utf-8') as file:
        file.write(html_content)

    print(f"条目已成功添加到Markdown文件：{file_path}")
    print(f"转换后的HTML文件已保存：{html_file_path}")

# 示例用法
markdown_file = 'example.md'
title = '新条目'
content = '这是一个新的条目内容。'

add_item_to_markdown(markdown_file, title, content)