code: def progressbar(stream, prefix='Loading: ', width=0.5, **options):
      
      size = len(stream)
      if not size:
          return stream
      if 'width' not in options:
          if width <= 1:
              width = round(shutil.get_terminal_size()[0] * width)
          options['width'] = width
      with ProgressBar(max=size, prefix=prefix, **options) as b:
          b.set(0)
          for i, x in enumerate(stream, 1):
              yield x
              b.set(i)
docs: Generator filter to print a progress bar.