docstr: save TopicModel object
docstr_tok: ["save","TopicModel","object"]
code: def save(self, fname):
      """
      save TopicModel object
      """
  
      with open(fname + ".tm_vect", "wb") as f:
          pickle.dump(self.vectorizer, f)
      with open(fname + ".tm_model", "wb") as f:
          pickle.dump(self.model, f)
      params = {
          "n_topics": self.n_topics,
          "n_features": self.n_features,
          "verbose": self.verbose,
      }
      with open(fname + ".tm_params", "wb") as f:
          pickle.dump(params, f)
  
      return
  
imports: import time
  from ..None import utils
  from ..imports import *
  from .None import preprocessor
  from .None import textutils
label_desc: Use image node_id 27 for calling the TopicModel obj's underlying member method code with example usage: obj.save(fname) without return types