code: def vector_filter(actual_vector, predict_vector):
      
      temp = []
      temp.extend(actual_vector)
      temp.extend(predict_vector)
      types = set(map(type, temp))
      if len(types) > 1:
          return [list(map(str, actual_vector)), list(map(str, predict_vector))]
      return [actual_vector, predict_vector]
docs: Convert different type of items in vectors to str.
  
      :param actual_vector: actual values
      :type actual_vector : list
      :param predict_vector: predict value
      :type predict_vector : list
      :return: new actual and predict vector