[{'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:for pres in train_data['president'].unique():\n    words =[]\n    for sentence in train_data[train_data['president'] == pres].clean_text:\n        words.extend(tokeniser(sentence))\n    \n    wordcloud = WordCloud().generate_from_frequencies(frequencies=Counter(words))\n    plt.figure(figsize=(12,8))\n    plt.imshow(wordcloud, interpolation='bilinear')\n    plt.axis('off')\n    plt.title(pres)\n    plt.show()"}, {'role': 'assistant', 'content': "['helper_functions', 'comment_only']"}]