如何以递归方式将目录复制到另一个目录并仅替换未更改的文件？

xcopy /s /e /u /y /i source_directory target_directory

rsync -av --update source_directory target_directory

import os
import shutil

def copy_directory(src, dst):
    for item in os.listdir(src):
        src_path = os.path.join(src, item)
        dst_path = os.path.join(dst, item)
        if os.path.isdir(src_path):
            if not os.path.exists(dst_path):
                os.makedirs(dst_path)
            copy_directory(src_path, dst_path)
        else:
            if not os.path.exists(dst_path) or os.path.getmtime(src_path) > os.path.getmtime(dst_path):
                shutil.copy2(src_path, dst_path)

source_directory = 'source'
target_directory = 'target'
copy_directory(source_directory, target_directory)

from distutils.dir_util import copy_tree

source_directory = 'source'
target_directory = 'target'
copy_tree(source_directory, target_directory, update=1)