python 一个文件夹最新文件复制到另外一个文件夹

# -*- coding: utf-8 -*-
import os
import shutil


def listdir(path, list_name):  # 传入存储的list
    for file in os.listdir(path):
        file_path = os.path.join(path, file)
        if os.path.isdir(file_path):
            listdir(file_path, list_name)
        else:
            list_name.append((file_path, os.path.getctime(file_path)))


def newestfile(target_list):
    newest_file = target_list[0]
    for i in range(len(target_list)):
        if i < (len(target_list) - 1) and newest_file[1] < target_list[i + 1][1]:
            newest_file = target_list[i + 1]
        else:
            continue
    print('newest file is', newest_file)
    return newest_file

def set(k):
    default_path = r'C:\Users\Asus\Downloads'
    down_file = r'C:\Users\Asus\Desktop\ie客户平台数据对比\网上充值明细.xlsx'
    list = []  #暂估价项目疑问-3.31.xls
    listdir(default_path, list)
    new_file = newestfile(list)
    print('from:', new_file[0])
    print('to:', shutil.copy(new_file[0], down_file))
    print(k)


if __name__ == '__main__':
    set("das")