[descriptions](url) to [descriptions][number]

markdown_convert_links.py

import os
import re

def convert_markdown_links(input_file, output_file):
    """读取 Markdown 文件，将链接转换为脚注形式，并输出到新文件。"""
    links = {}
    count = 1

    def replace_link(match):
        nonlocal count
        link_text = match.group(1)
        link_url = match.group(2)
        if link_url not in links:
            links[link_url] = count
            count += 1
        return f"[{link_text}][{links[link_url]}]"

    with open(input_file, 'r', encoding='utf-8') as infile, \
         open(output_file, 'w', encoding='utf-8') as outfile:

        for line in infile:
            # 使用正则表达式替换链接
            converted_line = re.sub(r"\[(.*?)\]\((.*?)\)", replace_link, line)
            outfile.write(converted_line)

        # 在文件末尾添加脚注
        if links:
            outfile.write("\n")
        for link_url, index in links.items():
            outfile.write(f"[{index}]: {link_url}\n")

if __name__ == "__main__":
    while True:
        input_file = input("请输入 Markdown 文件名 (或输入 'q' 退出): ")
        if input_file.lower() == 'q':
            break

        if not os.path.isfile(input_file):
            print("文件不存在，请重新输入。")
            continue

        output_file = f"{os.path.splitext(input_file)[0]}_converted.md"
        convert_markdown_links(input_file, output_file)
        print(f"已将转换后的 Markdown 内容写入到 {output_file}")
        break