code: def format_row(pid="", port="", name="", mem="", workers="", prefix_char="  "):
      
      row = "%s%-5s %-6s %-25s %8s %7s " \
            % (prefix_char, pid, port, name, mem, workers)
  
      global screen_width
      if screen_width is None:
          screen_width = len(row)
      return row
docs: Applies consistant padding to each of the columns in a row and serves as
      the source of the overall screen width.