def pre_process(self, df):
featureExtractor = FeatureExtractor(df)
# featureExtractor.combine_all_data()
featureExtractor.add_features()
featureExtractor.stem_gadya()
featureExtractor.cnt_remove_sw()
featureExtractor.get_hard_word_cnt()
# featureExtractor.remove_outliers()
# featureExtractor.get_local_word_cnt()
featureExtractor.build_word_vec_map()
featureExtractor.get_word2vec()
featureExtractor.get_word_dist()
featureExtractor.build_pos_cols()
return featureExtractor.get_df()
