[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': 'Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:import plotly.graph_objects as go\nimport matplotlib.pyplot as plt\nfrom tqdm import tqdm\nimport time\nfrom datetime import datetime\nfrom pathlib import Path\nfrom sklearn import preprocessing\nimport keras.backend as K\nfrom keras.models import Sequential\nfrom keras.layers import Dense, LSTM, Dropout, GRU\nfrom keras.callbacks import EarlyStopping\nfrom sklearn.preprocessing import StandardScaler, MinMaxScaler'}, {'role': 'assistant', 'content': 'helper_functions'}]