logreg = Pipeline(steps=[("vectorizer", TfidfVectorizer(max_df=MAX_DF,
                                                            min_df=MIN_DF,
                                                            stop_words=russian_stopwords,
                                                            token_pattern=u'(?ui)\\b\\w*[а-я]+\\w*\\b')),
                         ("log_reg", LogisticRegression(n_jobs=N_JOBS,
                                                           solver="saga",
                                                           multi_class="multinomial",
                                                           random_state=100500))
                             ],
                  verbose=True)