os.walk in python

import os
folder_path = r'C:\Test'
for root,dirs,files in os.walk(folder_path, topdown=True):
  print(root)
  print(dirs)
  print(files)

# Driver function 
import os 
if __name__ == "__main__": 
    for (root,dirs,files) in os.walk('Test', topdown=true): 
        print root 
        print dirs 
        print files 
        print '--------------------------------'

    x = ('key1', 'key2', 'key3')

thisdict = dict.fromkeys(x)


    print(thisdict)
#values are all None