两秒更新显示文件夹下新增文件

import os  
import time

OLD=[]  
NEW=[]
    
def file_name(file_dir):   
    L=[]   
    for root, dirs, files in os.walk(file_dir):  
        for file in files:  
            if os.path.splitext(file)[1] == '.jpeg':  
                L.append(os.path.join(root, file))  
    return L  

fileName=file_name('C:\\Users\\Administrator\\ftp')
print(fileName)

print(fileName[-1])


#a.sort()排序
NEW.sort()

while True:
    NEW=file_name('C:\\Users\\Administrator\\ftp')
    c = [x for x in NEW if x in OLD]
    d = [y for y in (NEW+OLD) if y not in c]
    print(d)
    time.sleep(2)
    OLD = NEW