code: def rmmkdir(dir_path):
          # type: (AnyStr) -> None
          
          if not os.path.isdir(dir_path) or not os.path.exists(dir_path):
              os.makedirs(dir_path)
          else:
              rmtree(dir_path, True)
              os.makedirs(dir_path)
docs: If directory existed, then remove and make; else make it.