获取一个目录中所有.Rmd文件中加载的所有包的列表

import os
import re

def get_packages(directory):
    package_list = set()
    
    for root, dirs, files in os.walk(directory):
        for file in files:
            if file.endswith(".Rmd"):
                file_path = os.path.join(root, file)
                with open(file_path, 'r') as f:
                    content = f.read()
                    # 使用正则表达式提取包名
                    packages = re.findall(r"(?:library|require)\((.*?)\)", content)
                    package_list.update(packages)
    
    return sorted(package_list)

directory = "/path/to/directory"
packages = get_packages(directory)
print(packages)