old_contents: # coding: utf-8
  """
  Visual console "toys".
  """
  
  import time
  import sys
  import threading
  import typing
  
  
  class Roller(threading.Thread):
      """
      Roller of some fun sequences while waiting.
      """
  
      def __init__(self) -> None:
          threading.Thread.__init__(self)
          self.__sequence = ['-', '\\', '|', '/',]
          self.__freq = .1
          self.__offset = 0
          self.__running = False
          self.__message: typing.Optional[str] = None
  
      def run(self) -> None:
          """
          Run roller.
  
          :return: None
          """
          self.__running = True
          while self.__running:
              if self.__offset > len(self.__sequence) - 1:
                  self.__offset = 0
  
              sys.stdout.write("\b" + self.__sequence[self.__offset])
              sys.stdout.flush()
              time.sleep(self.__freq)
  
              self.__offset += 1
  
          print("\b" + (self.__message or ""))
          sys.stdout.flush()
  
      def stop(self, message: typing.Optional[str] = None) -> None:
          """
          Stop roller.
  
          :param message: Message for the roller.
          :return: None
          """
          self.__message = message if message else "  "
          self.__running = False
          self.__offset = 0
  
  
  # if __name__ == '__main__':
  #     print("Doing thing:\t", end="")
  #     sys.stdout.flush()
  #
  #     roller = Roller()
  #     roller.start()
  #     time.sleep(5)
  #     roller.stop("finished")
  #     time.sleep(1)
  #     print("OK")
  
new_contents: # coding: utf-8
  """
  Visual console "toys".
  """
  
  import time
  import sys
  import threading
  import typing
  
  
  class Roller(threading.Thread):
      """
      Roller of some fun sequences while waiting.
      """
  
      def __init__(self) -> None:
          threading.Thread.__init__(self)
          self.__sequence = ['-', '\\', '|', '/', ]
          self.__freq = .1
          self.__offset = 0
          self.__running = False
          self.__message: typing.Optional[str] = None
  
      def run(self) -> None:
          """
          Run roller.
  
          :return: None
          """
          self.__running = True
          while self.__running:
              if self.__offset > len(self.__sequence) - 1:
                  self.__offset = 0
  
              sys.stdout.write("\b" + self.__sequence[self.__offset])
              sys.stdout.flush()
              time.sleep(self.__freq)
  
              self.__offset += 1
  
          print("\b" + (self.__message or ""))
          sys.stdout.flush()
  
      def stop(self, message: typing.Optional[str] = None) -> None:
          """
          Stop roller.
  
          :param message: Message for the roller.
          :return: None
          """
          self.__message = message if message else "  "
          self.__running = False
          self.__offset = 0
  
  
  # if __name__ == '__main__':
  #     print("Doing thing:\t", end="")
  #     sys.stdout.flush()
  #
  #     roller = Roller()
  #     roller.start()
  #     time.sleep(5)
  #     roller.stop("finished")
  #     time.sleep(1)
  #     print("OK")
  
subject: Add lintfix: extra space required