Copy folders to newly created folder and append

[Filthy_McNasty]

This created new Working folder but for some reason it does not coy created folders from Python_1, any idea where the error is:

import os
import shutil

root_path = r"C:\GEOS455\Assign2"
new_main_folder = 'Working'

new_root_path = os.path.join(root_path, new_main_folder)
os.mkdir(new_root_path)

list_dir = []  
for directory in list_dir:
    src = os.path.join(root_path, directory)  
    dest = os.path.join(new_root_path, directory + '_working')  
    shutil.copytree(src, dest)