code: def pipe_substr(context=None, _INPUT=None, conf=None, **kwargs):
      
      conf['start'] = conf.pop('from', dict.get(conf, 'start'))
      splits = get_splits(_INPUT, conf, **cdicts(opts, kwargs))
      parsed = utils.dispatch(splits, *get_dispatch_funcs())
      _OUTPUT = starmap(parse_result, parsed)
      return _OUTPUT
docs: A string module that returns a substring. Loopable.
  
      Parameters
      ----------
      context : pipe2py.Context object
      _INPUT : iterable of items or strings
      conf : {
          'from': {'type': 'number', value': <starting position>},
          'length': {'type': 'number', 'value': <count of characters to return>}
      }
  
      Returns
      -------
      _OUTPUT : generator of substrings