code: def _print_throbber(self):
          '''Print an indefinite progress bar.'''
          self._print('[')
  
          for position in range(self._bar_width):
              self._print('O' if position == self._throbber_index else ' ')
  
          self._print(']')
  
          self._throbber_index = next(self._throbber_iterf _print_throbber(self):
          '''Print an indefinite progress bar.'''
          self._print('[')
  
          for position in range(self._bar_width):
              self._print('O' if position == self._throbber_index else ' ')
  
          self._print(']')
  
          self._throbber_index = next(self._throbber_iter)
docs: Print an indefinite progress bar.