code: def tracebacks_from_file(fileobj, reverse=False):
      
  
      if reverse:
          lines = deque()
  
          for line in BackwardsReader(fileobj):
              lines.appendleft(line)
              if tb_head in line:
                  yield next(tracebacks_from_lines(lines))
                  lines.clear()
      else:
          for traceback in tracebacks_from_lines(fileobj):
              yield traceback
docs: Generator that yields tracebacks found in a file object
  
      With reverse=True, searches backwards from the end of the file.