python batch run py files

import os

path="E:\\python"  #Batch py file path

for root,dirs,files in os.walk(path): #Enter the folder directory
 for f in files: #Files under the folder
  if os.path.splitext(f)[1]=='.py': #Run only py files
   os.chdir(root)
   os.system('python {}'.format(f))  #Terminal run python main.py