code: def more_like_this(self, q, mltfl, handler='mlt', **kwargs):
          
          params = {
              'q': q,
              'mlt.fl': mltfl,
          }
          params.update(kwargs)
          response = self._mlt(params, handler=handler)
          decoded = self.decoder.decode(response)
  
          self.log.debug(
              "Found '%s' MLT results.",
              # cover both cases: there is no response key or value is None
              (decoded.get('response', {}) or {}).get('numFound', 0)
          )
          return self.results_cls(decoded)
docs: Finds and returns results similar to the provided query.
  
          Returns ``self.results_cls`` class object (defaults to
          ``pysolr.Results``)
  
          Requires Solr 1.3+.
  
          Usage::
  
              similar = solr.more_like_this('id:doc_234', 'text')