docs: def human_bytes(n):
      """
      Return the number of bytes n in more human readable form.
      """
      if n < 1024:
          return '%d B' % n
      k = n/1024
      if k < 1024:
          return '%d KB' % round(k)
      m = k/1024
      if m < 1024:
          return '%.1f MB' % m
      g = m/1024
      return '%.2f GB' % g