Gets a directory of all files (full path, to help os.path.join () method)

1 import os
2 
3 ls =[]
4 for root, dirs, files in os.walk('d:\\test'):  root 是str  dirs 是list files 是list 
5     for file in files:
6         ls.append(os.path.join(root,file))
7 print(ls)