os.makedirs正在创建一个文件名为的新文件夹

如果一个文件不包含名为“过时”的子字符串,我会尝试将所有文件夹和文件从一个路径复制到另一个路径。这是我的代码:

import os
import shutil

rootdir = "C:/Old"     
new_rootdir = "C:/New/"

for root, dirs, files in os.walk(rootdir):
    for filename in files:
        if not "obsolete" in filename:
            source = root + "\\" + filename
            extra_paths = source.split("\\")[1:]    # strings to be merged to the new destination
            destination = new_rootdir + "/".join(extra_paths)
        
            if not os.path.exists(destination):
                os.makedirs(destination)  # Create the destination directory if it doesn't exist
        
            if os.path.isdir(source):
                for root, dirs, files in os.walk(source):
                    for directory in dirs:
                        source_path = os.path.join(root, directory)
                        destination_path = os.path.join(destination, os.path.relpath(source_path, source))
                        if not os.path.exists(destination_path):
                            os.makedirs(destination_path)
                    for file in files:
                        source_path = os.path.join(root, file)
                        destination_path = os.path.join(destination, os.path.relpath(source_path, source))
                        shutil.copy2(source_path, destination_path)
            else:
                shutil.copy2(source, destination) 

脚本可以工作,但它为每个文件创建一个新的文件夹,上面有它的名称 C:/Old/Documents/example.txt 它正在创造一条新的道路 C:/New/Documents/example.txt/example.txt 应该是 C:/New/Documents/example.txt

如何修复此问题,使脚本不会创建具有文件名的文件夹?