递归算法，递归复制目录

import os
import shutil
# todo python 递归算法


def copy(src,dest):
    files=os.listdir(src)
    os.mkdir(dest)
    for file in files:
        src_file_path= os.path.join(src,file)
        dest_file_path=os.path.join(dest,file)
        if os.path.isfile(src_file_path):
            with open(src_file_path,"rb")as rs:
                reader_stream=rs.read()
            with open(dest_file_path,"wb")as ws:
                ws.write(reader_stream)
        else:
            # is dir
            copy(src_file_path,dest_file_path)