code: def resplit(prev, pattern, *args, **kw):
      
      maxsplit = 0 if 'maxsplit' not in kw else kw.pop('maxsplit')
      pattern_obj = re.compile(pattern, *args, **kw)
      for s in prev:
          yield pattern_obj.split(s, maxsplit=maxsplit)
docs: The resplit pipe split previous pipe input by regular expression.
  
      Use 'maxsplit' keyword argument to limit the number of split.
  
      :param prev: The previous iterator of pipe.
      :type prev: Pipe
      :param pattern: The pattern which used to split string.
      :type pattern: str|unicode