python 獲得文件下文件的絕對目錄

import os 
import string 
rootdir = os.getcwd()  
print('rootdir = ' + rootdir)  
  
for (dirpath, dirnames, filenames) in os.walk(rootdir):  
    #print('dirpath = ' + dirpath)  
    for dirname in dirnames:  
        print('dirname = ' + dirname)  
    for filename in filenames:  
        print(os.path.join(dirpath, filename))