Python实现查询某个目录下修改时间最新的文件示例

# -*- 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
#p = r'C:\Users\WMB\700c-4'
p = r'C:\Users\Administrator\Desktop\img'
list = []
listdir(p, list)
new_file = newestfile(list)
print('from:',new_file[0])
print('to:',shutil.copy(new_file[0], 'C:\\Users\\Administrator\\Desktop\\img\\a.xml'))

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): #如果是目录，则递归执行该方法
   listdir(file_path, list_name)
  else:
    list_name.append((file_path,os.path.getctime(file_path))) #把文件路径，文件创建时间加入list中

def newestfile(target_list): #传入包含文件路径，文件创建时间的list
 newest_file = target_list[0] #冒泡算法找出时间最大的
 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

shutil.copy(new_file[0], 'C:\\Users\\Administrator\\Desktop\\img\\a.xml') #文件拷贝