code: def hr_size(num, suffix='B') -> str:
      
      for unit in ' KMGTPEZ':
          if abs(num) < 1024.0:
              return "%3.1f%s%s" % (num, unit if unit != ' ' else '', suffix)
          num /= 1024.0
      return "%.1f%s%s" % (num, 'Y', suffix)
docs: Human-readable data size
      From https://stackoverflow.com/a/1094933
      :param num: number of bytes
      :param suffix: Optional size specifier
      :return: Formatted string