[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify the code snippets into categories from the provided list of categories. List of categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']"}, {'role': 'user', 'content': "Identify to which category the provided code belongs and assign the code snippet to at least 1 but up to 5 categories based on the probabilities, ignore if the probability of the category is negligible. Strictly provide your response as a list. Avoid providing any additional information, commentary, or personal opinions.\\nPython Code:def make_tweetVector(df_comments):\ntweetVector = np.zeros((len(df_comments),200),dtype='float')\ncount = 0\nfor text in df_comments:\nvalids= 0\ntokens = build_tokens(text)\nrowVector = np.zeros(200,)\nfor token in tokens:\nif token not in learned_dictionary:\ncontinue\nelse:\nvalids+=1\nvec = learned_word_vectors[learned_dictionary[token.lower()]]\nrowVector = np.add(rowVector,vec)\ntweetVector[count] = rowVector/valids\ncount+=1\nreturn tweetVector"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]